• Home
  • Valentyn Tatarenko
Valentyn Tatarenko

Valentyn Tatarenko
National Academy of Sciences of Ukraine-G. V. Kurdyumov Institute for Metal Physics

Dr. (Phys.-Math.) Sci., Professor, Corresponding Member of the N.A.S. of Ukraine

About

199
Publications
21,807
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
783
Citations
Introduction
Fields of interest are as follow: strain-induced and screening effects in interparticle interactions in condensed matter; phase transitions, self-organization, relaxation kinetics, magnetic and transport properties of mixed systems; structure of doped graphene, phonons in graphene films and graphite-based layered systems, self-assembly fabrication of nanoscale materials; nonelectronic transport properties of condensed matter; history of physics
Additional affiliations
May 2019 - present
National Academy of Sciences of Ukraine
Position
  • Managing Director
Description
  • Interparticle interaction; Strain-induced effects; Radiation effects; Self-organisation; Instability; Relaxation kinetics; Short-range order; Diffuse scattering; Disorder–order transition; Transport in nanomaterials; Strongly correlated electron systems
February 2019 - May 2019
National Academy of Sciences of Ukraine
Position
  • Managing Director
Description
  • Interparticle interaction; Magnetism; Short-range order; Diffuse scattering; Disorder–order transition; Self-organisation; Stability; Relaxation kinetics; Radiation effects; Diffusion; Transport in nanoscale materials; Strongly correlated electron systems
June 2016 - February 2019
National Academy of Sciences of Ukraine
Position
  • Managing Director
Description
  • Interparticle interaction; Magnetism; Short-range order; Diffuse scattering; Disorder–order transition; Self-organisation; Stability; Relaxation kinetics; Radiation effects; Diffusion; Transport in nanoscale materials; Strongly correlated electron systems
Education
December 2002 - November 2004
National Academy of Sciences of Ukraine, G.V.Kurdyumov Institute for Metal Physics
Field of study
  • Thesis entitled ‘Configurational Effects of Size Mismatch and Blocking of Atoms in Nonstoichiometric Interstitial and Substitutional Phases’ was submitted for a Doctor of Science (Phys.-Math.)—Doctor’s Degree in Solid State Physics
October 1986 - March 1987
Institute for Metal Physics, A.S. of Ukr.S.S.R.
Field of study
  • Thesis entitled ‘Strain-Induced Interaction and Distribution of Impurity Atoms in Crystals with Close-Packed Structure’ was submitted for a Candidate of Science (Phys.-Math.)—Ph D Degree in Solid State Physics
September 1975 - May 1980
T. G. Shevchenko Kiev State University, Faculty of Physics
Field of study
  • General Physics, Theoretical Physics

Publications

Publications (199)
Article
Full-text available
Розвинуто новий підхід, який дозволяє врахувати одночасно вплив температури та тиску на динамічну в’язкість і самодифузію рідин. В рамках даної роботи досліджено моноатомні рідкі метали (Cs, K) під дією зовнішнього впливу. Проведено чисельні розрахунки і порівняльний аналіз їх кластероутворення для трьох можливих представлень кластерної будови речо...
Chapter
An object of the study in the chapter is the α″-Fe16N2-type phase, which possesses unique and promising magnetic properties, does not contain critical (non-renewable on the earth) elements, and that is why it stands as an alternative to both bulk and nanoscale rare-earth permanent magnets. The ferromagnetic α″-Fe16N2 martensite is nanostructured, i...
Article
Full-text available
Among the family of currently known promising quasi-two-dimensional (2D) materials, the authors of this survey concentrate on the problem of functionalization of the graphene- and phosphorene-based structures. In most cases, the modification of their properties occurs through the covalent or noncovalent surface functionalization and mechanical affe...
Conference Paper
Full-text available
В рамках даної роботи досліджено моноатомні рідкі метали (Cs, K) під дією зовнішнього впливу. Проведено чисельні розрахунки і порівняльний аналіз їх кластероутворення для трьох можливих представлень кластерної будови речовини: 1) структурними частинками якої є кристалоподібні атомні угруповання (кластери), що здійснюють обертальний Броунів рух, і п...
Article
Full-text available
A short historical review of stages of formation of the G. V. Kurdyumov Institute for Metal Physics (N.A.S. of Ukraine) in connection with its 75th anniversary is presented. (According to both the decree of the Council of Peoples Commissars of the Ukrainian S.S.R. of 15 November, 1945 and the decision of Presidium of the Academy of Sciences of the...
Conference Paper
Full-text available
Наразі стрімко розвивається дослідження металевих розплавів в рамках кластерного уявлення про їхню будову. Однак до сих пір не до кінця зрозумілий механізм кластероутворення і не досліджено границі областей існування кластерів в рідині. В рамках нашої роботи досліджено механізми кластероутворення в моноатомних рідких металах під дією зовнішнього вп...
Conference Paper
Full-text available
We report on the results obtained modelling the electronic and transport properties of single-layer graphene subjected to mechanical or magnetic fields and containing point defects. Reviewing, analyzing, and generalizing our findings, we claim that effects of uniaxial tensile strain or shear deformation along with their combination as well as struc...
Article
Для з’ясування основних рис симетрійно-енергетичного та структурно-ентропійного аспектів взаємочину домішки та розчинника розвинуто конфіґураційний модель бездифузійного утворення «гібридного» твердого розчину втілення–заміщення Me–X, в якому взаємодійні атоми неметалу X можуть займати як октаедричні міжвузловини, так і вузли ОЦК(Т)-ґратниці металу...
Article
Implementing the quantum-mechanical Kubo-Greenwood formalism for the numerical calculation of dc conductivity, we demonstrate that the electron transport properties of a graphene layer can be tailored through the combined effect of defects (point and line scatterers) and strains (uniaxial tension and shear), which are commonly present in a graphene...
Article
Full-text available
The literature (experimental and theoretical) data on the tetragonality of martensite with interstitial–substitutional alloying elements and vacancies are reviewed and analysed. Special attention is paid to the studying the martensitic αʺ-Fe16N2-type phase with unique and promising magnetic properties as an alternative to the rare-earth intermetall...
Article
Harnessing the full potential of graphene for optoelectronic and electrochemical devices requires tunning and goal-directed control of its electronic properties. We report a computational study of the electron density of states and catalytic activity of graphene in the perpendicular magnetic field. We focus on the influence of uniaxial strain, cova...
Article
The possibility of inducing a sizeable energy gap in the electronic structure of a graphene layer is still one of the biggest and most debated challenges in graphene electronics. Despite promising theoretical results, some experimental studies report the absence of a band gap even in highly mechanically strained graphene. In this paper, we address...
Chapter
Full-text available
The chapter generalizes results on influence of external strain or/and magnetic fields on the electronic and transport properties of graphene with different kinds of imperfections (point defects, etc.): resonant (neutral) adsorbed atoms either oxygen-or hydrogen-containing molecules or functional groups, vacancies or their complexes with substituti...
Article
Full-text available
Dissipative mechanism of formation of a modulated structure of vacancies in a body-centred cubic (b.c.c.) crystal is considered as its intrinsic property under an isothermal irradiation irrespectively of elastic-anisotropy factor sign. Conditions of self-organisation of a precursor of formation of a ‘superlattice’ of nanovoids, namely, the modulate...
Article
Full-text available
The paper combines two theoretical approaches – the method of grazing dynamical diffraction (which allows performing the nondestructive structural diagnostics of defects in the near‐surface layers) with efficient numerical simulation method (which enables computation of electron structure in realistically large systems with millions of atoms) – for...
Article
We study numerically a role of the uniaxial tensile strains and disordered defects in their impact on electronic density of states (DOS) in graphene exposed to an external magnetic field. The DOS curves are calculated using the tight-binding Hamiltonian, where the perpendicular magnetic field and uniaxial tension are included via the relevant modif...
Chapter
Full-text available
This chapter generalizes results on the influence of uniaxial strain and adsorption on the electron states and charge transport or localization in graphene with different configurations of imperfections (point defects): resonant (neutral) adsorbed atoms, either oxygen- or hydrogen-containing molecules or functional groups, vacancies or substitution...
Article
Full-text available
Spinodal mechanism of formation of a modulated structure in a spatial distribution of vacancies within the body-centred cubic (b.c.c.) crystal after irradiation is considered. The criterion of modulated-structure formation for the closed interacting-vacancies subsystem within the elastically anisotropic b.c.c. crystal is estimated. As shown, in cas...
Article
We report a calculational study of electron states and the resulting electrochemical properties of uniaxially strained graphene with point defects. For this study the reduction of ferricyanide to ferrocyanide serves as a benchmark electrochemical reaction. We find that the heterogeneous electron transfer activity of the perfect graphene electrode r...
Conference Paper
Full-text available
The main goal of our study was investigation of the influence of the deformations (sufficiently large for the establishing the non-zero gap) on electrotransport properties of impure graphene. To achieve this purpose, we implemented the simulation package that allows to perform numerical calculation of the conductivity and mobility of graphene sampl...
Article
Full-text available
The study deals with electronic properties of uniaxially stressed mono- and multi-layer graphene sheets with various kinds of imperfection: point defects modelled as resonant (neutral) adsorbed atoms or molecules, vacancies, charged impurities, and local distortions. The presence of randomly distributed defects in a strained graphene counteract the...
Article
Full-text available
The objective of this study is to calculate the parameters of strong exchange interactions within magnetic nanoparticles and weak (dipolar + anisotropic) interactions for the patterns of nanoparticles injected into non-magnetic substrate. The Fe–Pt magnetic system was chosen as the best applicable for this purpose. However, computations done in thi...
Article
Full-text available
The concentration dependences of the magnetic properties of binary b.c.c. alloys with substitutional disorder are investigated within the scope of the generalized single-band Hubbard model. The breaking of alloys’ translation invariance because of the atomic disorder leads to a violation of electron–hole symmetry, which results in both the threshol...
Article
Full-text available
A short historical review of stages of formation of the G. V. Kurdyumov Institute for Metal Physics (at the N.A.S. of Ukraine) in connection with its seventieth anniversary is presented. (According to both the decree of the Council of Peoples Commissars of the Ukrainian SSR of 15 November, 1945 and the decision of Presidium of the Academy of Scienc...
Data
Full-text available
A kinetic model for the influence of external noises such as fluctuations of the vacancies’ generation rate and inhomogeneity of irradiated f.c.c. crystal on the formation of nanoscale modulated dissipative structure in a spatial distribution of vacancies is considered. The generation rate of vacancies all over the sites and a density of their disl...
Data
Full-text available
Within the scope of the self-consistent-field (SCF) and mean-SCF approximations, the Matsubara–Kanzaki–Krivoglaz lattice-statics method as well as the Krivoglaz–Clapp–Moss approach, the kinematic diffuse scattering intensities near the Bragg reflection caused by the atomic short-range order (taking into account the long-range magnetic order) in a (...
Article
Full-text available
As revealed, with the change of random spatial distribution of adatoms all over the graphene layer for correlated and ordered ones, the electroconductivity enhances in several (tens) times. Randomly arranged adatoms, which are attractive for uncombined charge carriers, manifest themselves as the long-range scattering centres, while they dominate as...
Data
Full-text available
Obstacles to the concept of an ideal diluted solution as a standard state, which has been widely used for a long time in physical metallurgy for statistical-thermodynamic treatments of interstitial solutions, are discussed. It is shown in this paper that partial molar entropy as a function of binary-solution con-centration is extremely sensitive to...
Article
Full-text available
A kinetic model for the influence of external noises such as fluctuations of the vacancies’ generation rate and inhomogeneity of irradiated f.c.c. crystal on the formation of nanoscale modulated dissipative structure in a spatial distribution of vacancies is considered. The generation rate of vacancies all over the sites and a density of their disl...
Data
Full-text available
A kinetic model for the influence of external noises such as fluctuations of the vacancies’ generation rate and inhomogeneity of irradiated f.c.c. crystal on the formation of nanoscale modulated dissipative structure in a spatial distribution of vacancies is considered. The generation rate of vacancies all over the sites and a density of their disl...
Article
The chapter combines analytical (statistical-thermodynamic and kinetic) with numerical (Kubo-Greenwood-formalism-based) approaches used to ascertain an influence of the configurations of point (impurities, vacancies) and line (grain boundaries, atomic steps) defects on the charge transport in graphene. Possible substitutional and interstitial graph...
Article
Full-text available
Electron-energy spectra and diagrams of magnetic-phase states of disordered b.c.c. binary substitutional alloys for various values of the parameter of elec-tron scattering by atoms of both constituents are investigated. To describe properties of these alloys, one-band tight-binding model taking into account electron-electron interactions in the cor...
Article
Full-text available
The "IMP Science Gateway Portal" (http://scigate.imp.kiev.ua) for complex workflow management and integration of distributed computing resources (like clusters, service grids, desktop grids, clouds) is presented. It is created on the basis of WS-PGRADE and gUSE technologies, where WS-PGRADE is designed for science workflow operation and gUSE - for...
Chapter
Full-text available
The chapter combines analytical (statistical-thermodynamic and kinetic) with numerical (Kubo-Greenwood-formalism-based) approaches used to ascertain an influence of the configurations of point (impurities, vacancies) and line (grain boundaries, atomic steps) defects on the charge transport in graphene. Possible substitutional and interstitial graph...
Data
Full-text available
We consider the analytic peculiarities and singularities of various interactions between hydrogen-isotope (H, D) atoms located at tetrahedral interstices in an h.c.p. metal Me (Me = α-Y, α-Sc, α-Ti, α-Zr) taking into account its atomism, anisotropy of elasticity, and ‘size’ effect. The interaction between H (D) atoms, caused by distortions they ind...
Article
Full-text available
Exchange integrals for f.c.c. Fe–Pt alloys in the whole platinum content range are estimated. Temperature dependences of spontaneous magnetizations of Fe and Pt subsystems for various platinum contents are obtained.
Conference Paper
Full-text available
The method of the molecular dynamics is used in computer modelling of behaviour of freely based monolayer graphene membrane in the conditions of a nanoindentation inside an atomic-force microscope. Elastic properties and breaking strength are estimated for different physical conditions (nanoindenter velocity, nanoindenter head radius, nanoindenter...
Article
Full-text available
Within the scope of the self-consistent-field (SCF) and mean-SCF approximations, the Matsubara–Kanzaki–Krivoglaz lattice-statics method as well as the Krivoglaz–Clapp–Moss approach, the kinematic diffuse scattering intensities near the Bragg reflection caused by the atomic short-range order (taking into account the long-range magnetic order) in a (...
Article
Full-text available
Using the ab initio methods, boron or nitrogen doping effects on the characteristics of electron and vibrational spectrums of graphene are studied. We revealed that a mutual arrangement at the largest distance from each other is energy-preferred for these dopant atoms. Depending on their kind, one can regulate conductance and raise values of fundam...
Article
Full-text available
Possible ordered distributions of carbon (C) and substituting dopant (A) atoms over the sites in a graphene-type lattice are considered for C2A- and C5A-type (super)structures (corresponding to stoichiometries of 1/3 and 1/6, respectively). Relaxation model of atomic long-range order (LRO) in a graphene-based lattice is developed, and kinetic curve...