Nguyen Quang Bau

VNU University of Science, Vietnam National University · Faculty of Physics

General analytic expressions for the total absorption coefficient of strong electromagnetic waves caused by confined electrons in Infinite semi-parabolic plus Semi-inverse Squared Quantum Wells (ISPSISQW) are obtained by using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. A second-order multi-photon p...

The influence of confined optical phonons (confined OP) and electromagnetic waves on the Peltier effects in rectangular quantum wires (RQW) in a parallel magnetic field is investigated. Theoretical results for the parallel Peltier coefficient (PC) are determined using the quantum kinetic equation method. It is defined as a function of the external...

We applied the quantum kinetic equation method to investigate the influence of confined optical phonons (confined OP) on the photo-stimulated Ettingshausen effect in rectangular quantum wires (RQW) subjected to a perpendicular magnetic field. We considered the case where the confined electrons-confined OP scattering is the dominant mechanism. Analy...

Two scattering mechanisms, including the confined electron (CE)–confined acoustic phonon (CAP) scattering and the CE–confined optical phonon (COP) scattering, have been considered in the theoretical problem of photo-stimulated thermo-magnetoelectric effects (TME) occurring in two-dimensional compositional semiconductor superlattices (CSS). The quan...

The Photo-stimulated thermo-magnetoelectric effect in cylindrical quantum wires (CQW) under the effect of confined optical phonons (OP) is investigated. Analytical expressions of the Ettingshausen coefficient (EC), the Peltier coefficient (PC) and the temperature difference are obtained. The limitation for unconfined OP case and bulk semiconductor...

The Quantum photo-stimulated Peltier effect has been theoretically studied under the influence of confined acoustic phonon in a cylindrical quantum wires with an infinite potential by using the quantum kinetic equation method. In this work, we assume that the confined electrons-confined acoustic phonons scattering is essential. Moreover, the presen...

The resonance of the quantum Peltier coefficient (qPC) in a parabolic quantum well (PQW) of GaAs/GaAsAl, subjected to a dc electric field, a magnetic field and a laser radiation, has been theoretically studied by using the quantum kinetic equation method with the assumption that the confined electron-confined optical phonon scattering is essential....

Based on the quantum kinetic equation (QKE) for electron, we have theoretically studied the theory of photo-stimulated Ettingshausen effect in a one-dimensional cylindrical quantum wire (CQW). The strong electromagnetic wave (EMW) [Formula: see text] plays a role as photo-stimulation source. We obtain the analytic expressions for the kinetic tensor...

This work studies the linear, the third-order nonlinear, and the total optical absorption coefficients (OACs) and the refractive index changes (RICs) caused by both intra- and inter-band transitions in the WSe2 monolayer. The expression for the OACs and RICs in the presence of a magnetic field as well as the Zeeman and electric fields are found by...

Based on the kinetic equation method, the quantum Peltier effect has been theoretically studied under the influence of confined acoustic phonon in doped semiconductor superlattice in the presence of the electromagnetic wave (laser radiation). There were complicated dependences of the analytical expression of the Peltier coefficient (PC) on quantiti...

The acoustomagnetoelectric (AME) effect in an GaAs/AlGaAs rectangular quantum wire with infinite potential (RQWIP) is investigated under the influence of electromagnetic wave (EMW) by using quantum kinetic equation (QKE) method. We obtain the electron distribution function in the interaction with internal and external phonon. By solving the inhomog...

Based on the quantum kinetic equation method, the quantum Ettingshausen effect has been theoretically studied under the influence of confined acoustic phonon in a cylindrical quantum wire (CQW) with infinite potential in the presence of a strong electromagnetic wave. We considered a quantum wire in the presence of a constant electric field, a magne...

Biểu thức của hệ số Ettingshausen trong hố lượng tử với hố thế parabol khi có sóng điện từ được thu nhận trên cơ sở phương trình động lượng tử cho hàm phân bố của điện tử trong trường hợp tán xạ điện tử - phonon âm giam cầm. Các kết quả giải tích đã chỉ ra sự phụ thuộc phức tạp của hệ số Ettingshausen vào nhiệt độ, từ trường, các đại lượng đặc trưn...

Photo-stimulated quantum thermo-magnetoelectric effects in doped two-dimensional semiconductor superlattices, including the photo-stimulated quantum Ettingshausen effect and the photo-stimulated quantum Peltier effect, have been theoretically studied by using the quantum kinetic equation method. In this work, we assume that the electron-confined ac...

The electron – optical phonon scattering is considered in detail to studying the Ettingshausen effect in doped semiconductor superlattice under the influence of phonon confinement and laser radiation. The analytical expressions for tensors and the Ettingshausen coefficient are obtained by using the kinetic equation method. The Ettingshausen coeffic...

The Hall effect in an one-dimensional cylindrical quantum wire (CQW) with an infinite potential is studied by using the quantum kinetic equation under the influence a strong electromagnetic wave within the mechanising of scattering on confined acoustic phonons. We consider a case where an one-dimensional CQW is placed in a magnetic field , a consta...

DNA has proven to be a promising material in fabrication and construction of complex structures with precise controlled nanoscale features. Most of the systems involving DNA are functioned in an aqueous solution where DNA molecules are strongly negatively charged. Therefore, understanding electrostatics of DNA system is essential for better underst...

The quantum Etttingshausen e˙ect in a parabolic quantum well subjected to a constant electric field, magnetic field in the presence of laser radiation is studied by using the quantum kinetic equation method. The analytic expressions for conductivity tensors and dynamic tensors as well as the Ettingshausen coe˚cient (EC) are obtained in the case of...

Based on the quantum kinetic equation for electrons, we have theoretically studied the influence of a Strong Electromagnetic Wave (EMW) on the Magneto-Thermoelectric Effects in a cylindrical quantum wire with an infinite potential (CQWIP) (for electron - optical phonon scattering) under the influence of electric field E1=(0,0,E1), magnetic field B=...

The paper presents research results of structure of the Mullite system (3Al2O3.2SiO2) by Molecular Dynamics simulation (MDs) using the Born–Mayer– Huggins pair interaction and periodic boundary conditions. The simulation is performed with model of 5250 atoms at different pressure and at 3500 K temperature. The structural properties of the system ha...

The quantum magneto-thermoelectric effect in a two-dimensional compositional superlattice under the influence of an electromagnetic wave (EMW) in two cases is investigated. Two cases of the electron scattering mechanism are considered: the electron-acoustic phonon scattering and electron-optical phonon scattering. Analytical expressions for the qua...

The influence of confined optical phonons on the Hall Coefficient (HC) in a Cylindrycal Quantum Wire (CQW) with an infinite potential (for electron – confined optical phonons scattering). Consider a case where CQW is placed in a perpendicular magnetic field , a constant - electric field and an intense electromagnetic wave . By using the quantum kin...

Ettingshausen coefficient (EC) in the compositional semiconductor superlattice under the influence of electromagnetic wave (EMW) is surveyed by using the quantum kinetic equation for electrons. The analytical expressions of the Ettingshausen coefficient are numerically calculated for the GaAs/AlGaAs compositional semiconductor superlattice. It have...

Based on the quantum kinetic equation for electrons, we have theoretically studied the influence of a Strong Electromagnetic Wave on the Ettingshausen Effect (EC) in a rectangular quantum wire with an infinite potential (RQWIP). We obtain the analytic expressions for the kinetic tensor as well as the Ettingshausen coefficient in the rectangular qua...

By using a quantum kinetic equation for electrons, we have studied the Acousto-electric effects in doped semiconductor superlattice (DSSL) under the influence of confined phonon. Considering the case of the electron - acoustic phonon interaction, we have found the expressions of the nonlinear quantum acousto-electric current. From these expression,...

In this paper, we have used the method of quantum kinetic equation to calculate the analytic expression for Ettingshausen coefficient (EC) under the influence of confined phonon. We considered a quantum well in the presence of constant electric field, magnetic field and electromagnetic wave (EMW) with assumption that electron – confined optical pho...

We theoretically study the magneto-optical absorption in a GaAs/Ga1−sAlsAs finite semi-parabolic quantum well where the two-photon process and electron–LO-phonon interaction have been included. The energy separation increases with Al-concentration and the field but decreases with the well-width. The peaks positions of the magneto-optical absorption...

The influence of electromagnetic wave (EMW) on the acous- tomagnetoelectric (AME)effect is studied theoretically in a quantum well. The expression of the AME field is obtained. Thedependences of the AME field on the temperature of system, the frequency of acoustic wave, thefrequency and intensity of electromagnetic wave and the parameters of a Quan...

By using a quantum kinetic equation for electrons, we studied magneto - thermoelectric effects in the doped semiconductor superlattice (DSSL) under the influence of electromagnetic waves (EMW). In case of the electron - acoustic phonon interaction, we have also figured out analytical expressions of the Ettingshausen coefficient (EC) in DSSL. These...

Interaction of external acoustic waves - confined electrons - internal phonons in a cylindrical quantum wire with an infinite potential (CQWIP) has been theoretically studied via the quantum kinetic equation for electrons in the presence of an external magnetic field (EMF). The quantum kinetic equation for the distribution function of electrons int...

The Shubnikov – de Haas magnetoresistance oscillations in the Quantum well (QW) under the influence of confined acoustic phonons, The theoretical results show that the conductivity tensor, the complex magnetic impedance of the magnetic field, the frequency, the amplitude of the laser radiation, the QW width, the temperature of the system and especi...

Based on the quantum kinetic equation method, the influence of confined optical phonons and laser radiation on the Radioelectric effect in a cylindrical semiconductor quantum wire with parabolic potential subjected to a dc electric field and a linearly polarized electromagnetic wave has been theoretically studied. The obtained analytical expression...

The effect of confined optical phonons and laser radiation are taken into account to study the Hall effect in a compositional semiconductor superlattice (CSSL). The new theoretical expressions of the Hall conductivity, the Hall coefficient and the magnetoresistance are obtained as functions of the external fields (the magnetic field B, the laser fr...

We have studied magneto-thermoelectric effects in quantum well in the presence of electromagnetic wave. The analytic expression for Ettingshausen coefficient (EC) in the Quantum Well with parabolic potential (QWPP) in the presence of Electromagnetic wave (EMW) is calculated by using the quantum kinetic equation for electrons. The dependence of EC o...

By using a quantum kinetic equation for electrons interacting with an optical phonon, an analytic expression is obtained for the Ettingshausen coefficient (EC) in quantum wells with parabolic potential (QWPP) under the influence of laser radiation. The dependence of EC on frequency, amplitude of laser radiation, quantum wells parameters and tempera...

The influence of confined optical phonons on the Hall effect in a quantum well under the present of a perpendicular magnetic field and an in-plane intense electromagnetic wave, has been theoretical studied. The analytical expression of the Hall coefficient for electron — confined optical phonon interaction is obtained base on the quantum kinetic eq...

The radioelectric effect (REE) in the Rectangular quantum wires (RQW) with an infinite potential under the influences of confined phonons and a linearly polarized electromagnetic wave (EMW) is theoretically studied by using quantum kinetic equations method. The obtained analytical expression of the Radioelectric field (REF) depends on frequencies o...

The influence of electromagnetic wave (EMW) on the acoustomagnetoelectric (AME) effect is studied theoretically in a doped superlattice (DSL). The expression of the AME field is obtained. The dependences of the AME field on the temperature of system, the frequency of acoustic wave, the frequency and intensity of electromagnetic wave and the paramet...

Based on the quantum kinetic equation method, the Hall effect in doped semiconductor superlattices (DSSL) has been theoretically studied under the influence of confined LO-phonons and the laser radiation. The analytical expression of the Hall conductivity tensor, the magnetoresistance and the Hall coefficient of a GaAs:Si/GaAs:Be DSSL is obtained i...

The Radioelectric effect in doped superlattices under the influence of confined phonon has been theoretically studied. The analytical expression for the Radioelectric field is obtained by quantum kinetic equation method. The theoretical expression shows that the Radioelectric field in doped superlattices depends on the frequencies and amplitudes of...

The Hall coefficient (HC) of a strong electromagnetic wave (EMW) caused by confined electrons in a rectangular quantum wire (RQW) is theoretically studied by using the quantum kinetic equation for electrons. The problem is considered in the case of electrons - acoustic phonons scattering. Wave function and energy spectrum in a RQW are different fro...

The magnetoresistivity (MR) is theoretically calculated in a compositional semiconductor superlattice (CSSL), subjected to a crossed DC electric field and magnetic field, in the presence of an intense electromagnetic wave (EMW). The magnetic field is oriented along the growth direction of the CSSL and the electron–acoustic phonon interaction is tak...

The quantum acoustoelectric (QAE) current is studied by a quantum kinetic equation method and we obtain analytic expression for QAE in a cylindrical quantum wire with an infinite potential (CQWIP) GaAs/GaAsAl. The computational results show that the dependence of the QAE current on the radius of CQWIP GaAs/GaAsAl, the Fermi energy εF and temperatur...

Based on the quantum kinetic equation for electrons, we theoretically study the influence of a Strong Electromagnetic Wave (EMW) on the Hall effect in a cylindrical quantum wire with infinitely high potential &; = 0) inside the wire and &; = ∞ elsewhere subjected to a crossed dc electric field &; = (0, 0, E 1) and magnetic field &; = (0, B, 0) in t...

The influence of confined acoustic phonons on the Radioelectric field in a quantum well has been studied in the presence of a linearly polarized electromagnetic wave and a laser radiation. By using the quantum kinetic equation for electrons with confined electrons - confined acoustic phonons interaction, the analytical expression for the Radio elec...

The Hall effect is studied theoretically in a doped semiconductor superlattice (DSSL) subjected to a crossed dc electric field and magnetic field in the presence of an intense electromagnetic wave (EMW). By using the quantum kinetic equation for electrons interacting with acoustic phonons at low temperature, we obtain expressions for the magnetores...

The Hall effect is theoretically studied in a rectangular quantum well (RQW) with infinite barriers subjected to a crossed dc electric field and magnetic field (the magnetic field is oriented perpendicularly to the barriers) in the presence of a high-frequency electromagnetic wave (EMW). By using the quantum kinetic equation for electrons interacti...

The longitudinal radioelectrical efffect in a parabolic quantum well (PQW) has been studied, based on the quantum kinetic equation for electrons under the action of a linearly polarized electromagnetic wave (EMW) and an intense laser field. Analytic expressions for the density of the current associated with the drag of charge carriers for the case...

The magnetoresistance is one of the important properties of semiconductors. Starting from the hamiltonian for the electron-acoustic phonon system, we obtained the expression for the electron distribution function and especially the expression for the magnetoresistance in quantum wells with parabolic potential (QWPP) under the influence of electroma...

The dependence of the Hall coefficient on doping concentration in doped semiconductor superlattices (DSSLs) under a crossed dc electric field and magnetic field in the presence of a laser radiation, is investigated by using a quantum kinetic equation for electrons. Analytical results for the resistance and the Hall coefficient (HC) are computationa...

Analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) caused by electrons confined in rectangular quantum wires (RQWs) in the presence of laser radiation are calculated using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The dependence of the ACF of a weak EMW...

We calculated analytic expressions for the absorption coefficient (ACF) of a weak electromagnetic wave (EMW) by confined electrons in cylindrical quantum wires (CQW) in the presence of laser radiation by using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The ACF of a weak EMW depends on the intensity...

We theoretically study the influence of an intense electromagnetic wave (EMW) on the Hall effect in compositional semiconductor superlattices (CSSLs) with a periodical superlattice potential in the z direction, subjected to a crossed dc electric field E→1 = (E1; 0; 0) and magnetic field B→ = (0; 0;B). By considering the electron-optical phonon inte...

The quantum theory of the photostimulated effects in quantum wire has been studied based on the quantum kinetic equation for electrons with a parabolic potential V (z) = mω02z2/2. In this case, electrons system in quantum wire is placed in a constant electric field E→0, an electromagnetic wave E→ (t) = E→ (e-iωt + eiωt) and in the presence of an in...

The influence of the electromagnetic wave on the quantum acoustomagnetoelectric (QAME) field in a quantum well with a parabolic potential (QWPP) is investigated for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path l of the electrons and in the region ql 蠐 1 (where q is the acoustic wave number). The dependence of the QA...

An analytic expression for the acoustoelectric current (AC) j ac induced by electron-external acoustic wave interactions and electron-internal acoustic wave (internal phonons) scattering in a quantum well (QW) is calculated by using the quantum kinetic equation for electrons. The physical problem is investigated in the region ql ≫ 1 (where q is the...

The quantum acoustoelectric (QAE) current is studied theoretically in a doped superlattice (DSL). The physical problem is investigated in the region ql ≫ 1 (where q is the acoustic wave number and l is the electrons mean free path). We obtain analytical expression for the QAE current in the DSL by using the quantum kinetic equation for electron-ext...

The analytic expression for the acoustoelectric (AE) current in the presence of an electromagnetic wave (EMW) induced by the electron-external acoustic wave (external phonons) interactions and electron-internal acoustic wave (internal phonons) scattering in a rectangular quantum wire (RQW) with an infinite potential is calculated by using the quant...

The influence of the electromagnetic wave on the nonlinear quantum acoustoelectric (QAE) current in a quantum well (QW) is investigated for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path l of the electrons and in the region ql ≫ 1 (where q is the acoustic wave number). The dependence of the QAE current jQAE on the fre...

The Hall effect is studied theoretically in a doped semiconductor superlattice (DSSL) with a periodical superlattice potential in the z-direction, subjected to a crossed dc electric field E1 = (0; 0;E1) and magnetic field B = (0;B; 0) (B is oriented in the plane of free motion of electrons) in the presence of a strong electromagnetic wave (EMW) cha...

The acoustomagnetoelectric (AME) field in a quantum well with a parabolic potential (QWPP) has been studied in the presence of an external magnetic field. The analytic expression for the AME field in the QWPP is obtained by using the quantum kinetic equation for the distribution function of electrons interacting with external phonons. The dependenc...

The acoustoelectric effect in a superlattice (SL) is investigated for an acoustic wave whose wavelength $\lambda =2\pi/ q$ is smaller than the mean free path $l$ of the electrons and hypersound in the region $ql\gg1$. (where $ q$ is the acoustic wave number) . A nonlinear dependence of the acoustoelectric current $j^{ac}$ on the constant electric f...

Based on the quantum kinetic equation for electrons, we theoretically study the influence of an electromagnetic wave (EMW) on the Hall effect in a quantum well (QW) with a parabolic potential V(z) = mω z z 2/2 (where m and ω z are the effective mass of electron and the confinement frequency of QW, respectively) subjected to a crossed dc electric fi...

The analytic expressions for the absorption coefficient (ACF) of a weak electro-magnetic wave (EMW) caused by confined electrons in the presence of laser radiation in quantum wells are obtained by using the quantum kinetic equation for electrons in the case of electron-optical phonon scattering. The dependence of the ACF of a weak EMW on the intens...

The influence of the electromagnetic wave on the nonlinear acoustoelectric effect (AE) in a superlattice (SL) is investigated for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path l of the electrons and hypersound in the region ql 1 (where q is the acoustic wave number). The dependence of the AE current j ac on the acous...

The acoustomagnetoelectric (AME) effect in a rectangular quantum wire (RQW) with an infinite potential is investigated in the presence of an external magnetic field (EMF). The analytic expression for the AME field in a RQW with an infinite potential is calculated by using the quantum kinetic equation for the distribution function of electrons inter...

The parametric resonance of confined acoustic phonons and confined optical phonons by an external electromagnetic wave in cylindrical quantum wires with an infinite potential is studied by using a set of quantum kinetic equations for confined phonons. The analytical ex-pression of the threshold amplitude E threshold of the field in a cylindrical qu...

The parametric transformation and parametric resonance of confined acoustic phonons and confined optical phonons by an external electromagnetic wave in doping super-lattices are theoretically studied by using a set of quantum kinetic equations for phonons. The analytic expression of the parametric transformation coefficient K 1 and the threshold am...

The acoustomagnetoelectric effect in a cylindrical quantum wire with an infinite potential in the presence of an external magnetic field is investigated by using Boltzmann kinetic equation for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path / of the electrons and hypersound in the region ql >> 1 (where q is the acousti...

The nonlinear absorption coefficient (NAC) of a strong electromagnetic wave (EMW) by confined electrons in quantum wells under the influences of confined phonons is theoretically studied by using the quantum transport equation for electrons. In comparison with the case of unconfined phonons, the dependence of the NAC on the energy (ħΩ), the amplitu...

The influences of confined phonons on the nonlinear absorption coefficient (NAC) by a strong electromagnetic wave for the case of electron-optical phonon scattering in doped superlattices (DSLs) are theoretically studied by using the quantum transport equation for electrons. The dependence of NAC on the energy (h{stroke}Ω), the amplitude E0 of exte...

The acoustomagnetoelectric (AME) effect in a superlattice (SL) induced by the interaction of acoustic phonons with the conducting electrons is calculated for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path l of the electrons and hypersound in the region ql 1 (where q is the acoustic wave number). The analytical express...

Analytic expressions for the nonlinear absorption coefficient of a strong electro-magnetic wave by confined electrons in rectangular quantum wires with infinite potential are calculated by using the quantum kinetic equation for electrons in two cases: electron-optical phonon scattering and electron-acoustic phonon scattering. The dependence of the...

Analytic expressions for the nonlinear absorption coefficient (nonlinear absorption coefficient = NAC) of a strong electromagnetic wave (laser radiation) caused by confined electrons for the case of electron - optical phonon scattering in doping superlattices (doping superlattices = DSLs) are calculated by using the quantum kinetic equation for ele...

Analytic expressions for the nonlinear absorption coefficient of a strong electromagnetic wave (laser radiation) caused by confined electrons for the case of electron - optical phonon scattering and electron - acoustic phonon scattering in quantum wells are calculated by using the quantum kinetic equation for electrons. The problem is also consider...

The parametric transformation of acoustic and optical phonons in doped superlattices is theoretically studied by using a set of quantum kinetic equations for the phonons. The analytic expression of parametric transformation coefficient of acoustic and optical phonons in doped superlattices is obtained, that depends non-linear on the concentration o...

The parametric resonance of acoustic and optical phonons in a doped superlattice with a non-degenerative electron gas in the presence of a laser field is theoretically predicted by using a set of quantum transport equations for the phonons. Dispersions of the resonant phonon frequency and the threshold amplitude of the field for parametric amplific...

The quantum theory of the absorption of weak electromagnetic waves (EMWs) caused by confined electrons in quantum wires has been studied based on Kubo's linear response theory and Mori's projection operator method. Analytical expressions for the absorption coefficients of weak EMWs in quantum wires with electron-acoustic phonon and electron-optical...

Phonon generation via the Cerenkov effect in rectangular quantum wires is theoretically studied based on the quantum kinetic equation for the phonon population operator. Analytical expressions for the rate of change of the phonon population and conditions for phonon generation are obtained. Numerical results for the specific rectangular quantum wir...

The parametric resonance of acoustic and optical phonons in a quantum well in the presence of an external electromagnetic field is theoretically predicted by using a set of quantum transport equations for the phonons. Dispersions of the resonant phonon frequency and the threshold amplitude of the field for parametric amplification of the acoustic p...

Analytic expressions for the high-frequency conductivity tensor and the absorption coefficient of a weak electromagnetic wave due to free carriers for the case of electron-optical phonon scattering in doped superlattices are calculated by using the Kubo-Mori method in two cases: the absence of a magnetic field and the presence of a magnetic field a...

Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of laser radiation in cylindrical quantum wires is calculated for the case of monophoton absorption process and the case of multiphoton absorption process. Analytical expressions and conditions for the absorpt...

Based on the quantum transport equation for the electron-phonon system, the absorption coefficient of sound (acoustic phonons) by absorption of a laser radiation in quantum wires with parabolic potential is calculated for the case of monophoton absorption and the case of multiphoton absorption. Analytical expressions and conditions for the absorpti...

Analytic expressions for the absorption coefficient of a weak Electromagnetic Wave (EMW) by free carriers for the case of electron-optical phonon scattering in quantum wells are calculated by the Kubo-Mori method in two cases: ---The absence of a magnetic field. ---The presence of a magnetic field applied perpendicular to its barriers. A different...

By the moment method established previously on the basis of the statistical mechanics, the thermodynamic properties of a strongly anharmonic face-centered and body-centered cubic crystal with point defect are considered. The thermal expansion coefficient, the specific heat Cv and Cp, the isothermal and adiabatic compressibility, etc. are calculated...

The absorption of a weak electromagnetic wave by free electrons in semiconductor superlattices in the presence of a laser radiation (non-modulated and modulated) is discussed. Ilie electron - Acoustic phonon scattering is assume to be dominant. The analytic expression of the absorption coefficient is obtained. The dependence of the absorption coeff...

Within the framework of the conditions ?; O » t-1 ( t-1 is the mean time of momentum relaxation), the coefficient of absorption a(O) of a weak electromagnetic wave by the free carriers of a polar semiconductor is calculated in the presence of a strong wave (of frequency O), for arbitrary values of O and O. Photon absorption by band electrons is due...

The nonlinear absorption of a strong electromagnetic wave caused by confined electrons in cylindrical quantum wires is theoretically studied by using the quantum kinetic equation for electrons. The problem is considered in the case electron-acoustic phonon scattering. Analytic expressions for the dependence of the nonlinear absorption coefficient o...