# Sergey V EremeevRussian Academy of Sciences | RAS

Sergey V Eremeev

doctor of physics

## About

268

Publications

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6,357

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Citations since 2017

## Publications

Publications (268)

Topological insulators in which the Fermi level is in the bulk gap and intersects only a topological surface state (the Dirac cone) are of special interest in the current research. In the last decades, a fine-tuning of the chemical composition of topological insulators has been carefully explored in order to control the Fermi level position with re...

New spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations. Using these results, the Na2KSb/Cs3Sb heterostructure is designed as a spin-polarized electron source in combination with the Al0.11Ga0.89As target as a spin...

Films of the hexagonal InTe with thicknesses from one to three tetralayers (TLs) were synthesized on the bilayer graphene/SiC by molecular beam epitaxy. Valence bands of the one- and two-TL-thick films were found to be flat-like near Γ¯ point, but become parabolic for the three-TL-thick film and beyond. The band gap of the InTe was found to be equa...

We report on the successful synthesis of a 2D atomically thin heavy-fermion CePb3 kagome compound on a Si(111) surface. Growth and morphology were controlled and characterized through scanning tunneling microscopy observations revealing the high crystalline quality of the sample. Angle-resolved photoelectron spectroscopy measurements revealed the g...

Adsorption of foreign atoms onto 2D materials can either lead to ordinary electron doping or the emergence of new electronic effects including topology, superconductivity, and quantum anomalous Hall and Kondo states. We have investigated the effect of Cr doping on the electronic structure of the α-Au/Si(111)- surface and its adsorbate-modified fami...

New spin-dependent photoemission properties of alkali antimonide semiconductor cathodes are predicted based on the detected optical spin orientation effect and DFT band structure calculations. Using these results, the Na$_2$KSb/Cs$_3$Sb heterostructure is designed as a spin-polarized electron source in combination with the Al$_{0.11}$Ga$_{0.89}$As...

Using density functional theory calculations we study atomic, electronic, and magnetic structures and their influence on the topological phase of Mn2Bi2Te5 and Mn2Sb2Te5 van der Waals compounds. Our results show that the antiferromagnetic topological insulator (AFM TI) phase in Mn2Bi2Te5 is robust both to details of the magnetic ordering within its...

Co-adsorption of Pb and Bi onto Si(111) and Ge(111) surfaces has been found to result in formation of atomic-layer PbBi compounds having similar structures. These are two co-existing crystalline PbBi phases with 2 3 √ × 2 3 √ and 2 × 2 periodicities. Using density functional theory calculations, we found that these two phases present insulating and...

The interplay of the atomic structure and phonon spectra in a variety of two dimensional phases forming during submonolayer Pb adsorption on a Cu(001) surface has been investigated using embedded atom method interatomic interaction potentials. Complementary calculations of the equilibrium atomic structure of these phases were performed using densit...

Thin films of magnetic topological insulators (TIs) are expected to exhibit a quantized anomalous Hall effect when the magnetizations on the top and bottom surfaces are parallel and a quantized topological magnetoelectric effect when the magnetizations have opposite orientations. Progress in the observation of these quantum effects was achieved ear...

Introducing magnetic exchange interaction into topological insulators is known to break the time-reversal symmetry and to open a gap at the Dirac point in the otherwise gapless topological surface states. This allows various novel topological quantum phenomena to be attained, including the quantum anomalous Hall effect and can lead to the emergence...

Transition-metal dichalcogenides (TMDCs) hosting type-II Dirac fermions have attracted a great deal of research interest owing to their rich application capabilities. Here, we have systematically investigated the bulk and surface electronic structures of type-II Dirac semimetal NiTe2 by means of angle-resolved photoelectron spectroscopy (ARPES) com...

Quantum phenomena at the ultimate atomic-scale two-dimensional limit attract increasing interest due to the emergence of exotic physics and potential applications in prospective electronic devices. In this work, we carried out a theoretical and experimental study of the atomic, electronic, and spin structures of the single-atomic-layer PbBi compoun...

In the novel stoichiometric iron-based material RbEuFe4As4 superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states; their coexistance is puzzling and represents a challenge for both experiment and theory. Using angle-resolved photoemission spectroscopy, resonant photoemission spectroscopy, Andreev reflection spectroscop...

In the novel stoichiometric iron-based material RbEuFe4As4, superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states. Using angle-resolved photoemission spectroscopy, we reveal a complex three-dimensional electronic structure and compare it with density functional theory calculations. Multiple superconducting gaps were m...

Using density functional theory, we propose the (MnSb2Te4)·(Sb2Te3)
n
family of stoichiometric van der Waals compounds that harbor multiple topologically nontrivial magnetic phases. In the ground state, the first three members of the family (n = 0, 1, 2) are 3D antiferromagnetic topological insulators, while for n ≥ 3 a special phase is formed, in...

Using first-principles density functional theory calculations, we made an accurate structural characterization of the C60 superstructures self-assembled on the Tl-adsorbed Si(111) and Ge(111) surfaces, which finds a good agreement with the recent scanning tunneling microscopy observations. Our band structure calculations revealed the semi-metallic...

In this paper, we report on the transient phase that forms at the initial stages of InSe growth on Si(111) surface. Using scanning tunneling microscopy and angle resolved photoemission spectroscopy observation and density-functional-theory (DFT) calculations we found that it consists of In-Se bi-layer that is half of the authentic InSe quadruple la...

Combining robust magnetism, strong spin-orbit coupling and unique thickness-dependent properties of van der Waals crystals could enable new spintronics applications. Here, using density functional theory, we propose the (MnSb$_2$Te$_4$)$\cdot$(Sb$_2$Te$_3$)$_n$ family of stoichiometric van der Waals compounds that harbour multiple topologically-non...

Feasibility of many emergent phenomena that intrinsic magnetic topological insulators (TIs) may host depends crucially on our ability to engineer and efficiently tune their electronic and magnetic structures. Here we report on a large family of intrinsic magnetic TIs in the homologous series of the van der Waals compounds (MnBi2Te4)(Bi2Te3)m with m...

Modification of the gap at the Dirac point (DP) in axion antiferromagnetic topological insulator \({\hbox {MnBi}}_2 {\hbox {Te}}_4\) and its electronic and spin structure have been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation at various temperatures (9–35 K), light polarizations and photon energies....

In pnictide RbEuFe4As4, superconductivity sets in at 36 K and coexists, below 15-19 K, with the long-range magnetic ordering of Eu 4f spins. Here we report scanning tunneling experiments performed on cold-cleaved single crystals of the compound. The data revealed the coexistence of large Rb-terminated and small Eu-terminated terraces, both manifest...

The structure and magnetic properties of small Cr clusters, Cr3 and Cr4, adsorbed on the Cu(111) surface have been investigated using density functional theory (DFT) calculations and their vibrational properties have been studied within calculations based on tight-binding second moment approximation interatomic interaction potentials (TBSMA). It ha...

Based on first-principles calculations, we study electronic structure of interfaces between a Z2 topological insulator (TI) SnBi2Te4 and a topological crystalline insulator (TCI) SnTe. We consider two interface models characterized by the different atomic structure on the contact of the SnTe(111) and SnBi2Te4(0001) slabs: the model when two materia...

Temperature dependence of the band structure, as well as the spin-polarization on the topologically trivial insulator TlBiS2 and nontrivial insulator TlBiSe2, have been investigated by spin- and angle-resolved photoelectron spectroscopy. Despite the recent theoretical prediction [Phys. Rev. Lett. 117, 246401 (2016).], topological phase transition (...

Materials that possess nontrivial topology and magnetism is known to exhibit exotic quantum phenomena such as the quantum anomalous Hall effect. Here, we fabricate a novel magnetic topological heterostructure Mn4Bi2Te7/Bi2Te3 where multiple magnetic layers are inserted into the topmost quintuple layer of the original topological insulator Bi2Te3. A...

Metal monochalcogenides (MX) have recently been rediscovered as two-dimensional materials with electronic properties highly dependent on the number of layers. Although some intriguing properties appear in the few-layer regime, the carrier mobility of MX compounds increases with the number of layers, motivating the interest in multilayered heterostr...

The post-graphene materials termed also as 2D-Xenes (X = Si, Ge, Sn, Pb, As, Sb or Bi) are atomic-layer sheets comprised of single-element atoms arranged in a honeycomb lattice on a suitable substrate. In the present report, we introduce a new member to the current 2D-Xene family, thallene built of atoms of the Group-III element, thallium (Tl). It...

In the novel stoichiometric iron-based material RbEuFe$_{4}$As$_{4}$ superconductivity coexists with a peculiar long-range magnetic order of Eu 4f states. Using angle-resolved photoemission spectroscopy, we reveal a complex three dimensional electronic structure and compare it with density functional theory calculations. Multiple superconducting ga...

We investigate the electronic and spin structure of Pb atomic chains on a Si(100)−2×1 surface using first-principles calculations. We revealed that the electronic spectra of linear dimerized Pb chains with orientations perpendicular and parallel to the Si dimers are characterized by one-dimensional large Rashba spin splitting providing exclusive sp...

A comprehensive study of the evolution of electronic structure and chemical bonding in disordered Ti1−xAlxN and Ti1−x−yAlxTayN systems was performed by means of ab initio density functional theory calculations using crystal orbital Hamilton population technique. Progressive changes in the character of interatomic chemical bonding were revealed when...

Modification of the gap at the Dirac point (DP) in antiferromagnetic (AFM) axion topological insulator MnBi$_2$Te$_4$ and its electronic and spin structure has been studied by angle- and spin-resolved photoemission spectroscopy (ARPES) under laser excitation with variation of temperature (9-35~K), light polarization and photon energy. We have disti...

Single monolayers of various materials (e.g., graphene, silicine, bismuthene, plumbene, etc.) have recently become fascinating and promising objects in modern condensed-matter physics and nanotechnology. However, growing a monolayer of non-layered material is still challenging. In the present study, single monolayer NiSi2 on Si(111) was grown for t...

Magnetic topological insulators are narrow-gap semiconductor materials that combine non-trivial band topology and magnetic order¹. Unlike their nonmagnetic counterparts, magnetic topological insulators may have some of the surfaces gapped, which enables a number of exotic phenomena that have potential applications in spintronics¹, such as the quant...

div>A comprehensive study of the evolution of electronic structure and chemical bonding in disordered Ti1-xAlxN and Ti1-x-y AlxTayN systems was performed by means of ab initio density functional theory calculations using crystal orbital Hamilton population technique.
<br

Quantum states of matter combining non-trivial topology and magnetism attract a lot of attention nowadays; the special focus is on magnetic topological insulators (MTIs) featuring quantum anomalous Hall and axion insulator phases. Feasibility of many novel phenomena that \emph{intrinsic} magnetic TIs may host depends crucially on our ability to eng...

The recently found (Tl,Au)/Si(100)c(2×2) two-dimensional compound which possesses spin-split surface states with peculiar spin texture and strong band anisotropy was examined using low-temperature scanning tunneling microscopy and scanning tunneling spectroscopy observations and in situ four-probe transport measurements. Two types of the one-dimens...

Within density functional theory we study the bulk band structure and surface states of bismuth oxychalcogenides Bi2O2Se and Bi2O2Te. We consider both polar and nonpolar surface terminations. On the basis of relativistic ab initio calculations, we show that both unreconstructed (polar) and reconstructed (nonpolar) surfaces possess the Rashba spin-s...

The magnetic properties of single- and multicomponent trimers of heavy p-elements of Groups IV-VI (Pb, Bi, Te) with a pronounced relativistic effect, as well as their anions and cations, are studied. Spin and orbital magnetic moments of the considered clusters are calculated using the formalism of the density functional theory. For most clusters, c...

This book provides a comprehensive discussion of various aspects of low-stability long-period states of condensed systems.

Using ab initio calculations, an investigation of the electronic structure of the magnetic insulator/topological insulator heterostructures is performed. Bismuth selenide is used as a topological insulator and monolayers of vanadium-based van der Waals materials VSe2 and VBi2Se4 – as magnetic materials. The formation of the latter one is possible v...

Using density functional theory and Monte Carlo calculations, we study the thickness dependence of the magnetic and electronic properties of a van der Waals interlayer antiferromagnet in the two-dimensional limit. Considering MnBi2Te4 as a model material, we find it to demonstrate a remarkable set of thickness-dependent magnetic and topological tra...

We present a theoretical investigation of the structural and vibrational properties of ordered 2D phases formed by the Li, Na and K atoms on the Cu[Formula: see text] surface. The lattice relaxation, phonon dispersions and polarization of vibrational modes as well as the local density of states are calculated using the embedded-atom method. The obt...

The multilevel approach was used to calculate the mechanical characteristics of transition metal nitrides based on the four-component system Ti-Al-Ta-N. The elastic moduli of TiN, AlN and TaN were obtained from first-principles calculations. The obtained values were shown to be in a good agreement with available results of other theoretical and exp...

Using density functional theory and Monte Carlo calculations, we study the thickness dependence of the magnetic and electronic properties of a van der Waals interlayer antiferromagnet in the two-dimensional limit. Considering $\mathrm{MnBi_2Te_4}$ as a model material, we find it to demonstrate a remarkable set of thickness-dependent magnetic and to...

By means of angle‐resolved photoemission spectroscopy measurements, the electronic band structure of the three‐dimensional PbBi4Te7 and PbBi6Te10 topological insulators is compared. The measurements clearly reveal coexisting topological and multiple Rashba‐like split states close to the Fermi level for both systems. The observed topological states...

A highly ordered (Tl,Au)/Si(100)c(2×2) two-dimensional compound was found to form upon room-temperature adsorption of 1.0 monolayer (ML) of Au onto a Tl/Si(100)2×1 surface with 1.0 ML of Tl. The compound was determined to have a double-atomic-layer structure where Au and Tl atoms constitute the bottom and top layers, respectively. The compound is m...

Magnetic proximity effect at the interface between magnetic and topological insulators (MIs and TIs) is considered to have great potential in spintronics as, in principle, it allows realizing the quantum anomalous Hall and topological magneto-electric effects (QAHE and TME). Although an out-of-plane magnetization induced in a TI by the proximity ef...

Despite immense advances in the field of topological materials, the antiferromagnetic topological insulator (AFMTI) state, predicted in 2010, has been resisting experimental observation up to now. Here, using density functional theory and Monte Carlo method we predict and by means of structural, transport, magnetic, and angle-resolved photoemission...

Heavy metal layers having a honeycomb structure on the Si(111) surface, were theoretically predicted to show prospects for possessing properties of the quantum spin Hall (QSH) insulators. The (Tl, Rb)/Si(111)√3×√3 atomic-layer compound synthesised in the present work is the first real system of such type, where atoms of heavy metal Tl are arranged...

Two-dimensional (2D) topological insulator is a promising quantum phase for achieving dissipationless transport due to the robustness of the gapless edge states resided in the insulating gap providing realization of the quantum spin Hall effect. Searching for two-dimensional realistic materials that are able to provide the quantum spin Hall effect...

The layered polar semiconductor BiTeI exhibits large Rashba-type spin–orbit splittings in its bulk and surface electronic structure. Here we report an artificial structural modification near the surface of BiTeI(0001) induced by annealing in vacuum. Using scanning tunneling microscopy we show that the annealing-induced change in the near-surface st...

We have grown the phase-homogeneous ternary compound with composition Bi2Te1.85S1.15 very close to the stoichiometric Bi2Te2S. The measurements performed with spin- and angle-resolved photoelectron spectroscopy as well as density functional theory and GW calculations revealed a wide-band-gap three-dimensional topological insulator phase. The surfac...

We have grown the phase-homogeneous ternary compound with composition Bi 2 Te 1.85 S 1.15 very close to the stoichiometric Bi 2 Te 2 S. The measurements performed with spin-and angle-resolved photoelectron spectroscopy as well as density functional theory and GW calculations revealed a wide-band-gap three-dimensional topological insulator phase. Th...

We have grown the phase-homogeneous ternary compound with composition Bi 2 Te 1.85 S 1.15 very close to the stoichiometric Bi 2 Te 2 S. The measurements performed with spin-and angle-resolved photoelectron spectroscopy as well as density functional theory and GW calculations revealed a wide-band-gap three-dimensional topological insulator phase. Th...

Formation of the highly-ordered √7×√7-periodicity 2D compound has been detected in the (Tl, Au)/Si(111) system as a result of Au deposition onto the
Tl/Si(111) surface and its composition, structure and electronic properties have been characterized using scanning tunneling microscopy and angle-resolved photoelectron spectroscopy observations and de...

The paper presents the results of theoretical investigations of the equilibrium atomic configurations and electronic properties of dimers and trimers of p-elements of IV (Pb), V (Bi) and VI (Te) groups as well as their cations and anions. The density functional theory calculations are used to obtain the equilibrium bond lengths and binding energies...

Recently, it was shown that quantum spin Hall insulator phase with a gap wide enough for practical applications can be realized in the ultrathin films constructed from two inversely stacked structural elements of trivial band insulator BiTeI. Here, we study the edge states in nanoribbons made of the Bi2Te2I2 sextuple layer (SL) and the electronic s...

We present a theoretical investigation of the structural and vibrational properties of the K/Cu(110) adsorbed systems using the embedded atom method. The surface relaxation, phonon dispersions and polarization of vibrational modes as well as the local density of states have been calculated as a function of potassium coverage on reconstructed and un...

In systems having an anisotropic electronic structure, such as the layered materials graphite, graphene and cuprates, impulsive light excitation can coherently stimulate specific bosonic modes, with exotic consequences for the emergent electronic properties. Here we show that the population of E2g phonons in the multiband superconductor MgB2 can be...

Two-dimensional compounds made of one monolayer of Tl and one-third monolayer of Pb, Bi, Te, or Se (but not of Sn or Sb) on Si(111) have been found to have a similar atomic arrangement which can be visualized as a 3×3-periodic honeycomb network of chained Tl trimers with atoms of the second adsorbate occupying the centers of the honeycomb units. St...

Recently, it was shown that quantum spin Hall insulator (QSHI) phase with a gap wide enough for practical applications can be realized in the ultra thin films constructed from two inversely stacked structural elements of trivial band insulator BiTeI. Here, we study the edge states in the free-standing Bi$_2$Te$_2$I$_2$ sextuple layer (SL) and the e...

Inducing magnetism into topological insulators is intriguing for utilizing exotic phenomena such as the quantum anomalous Hall effect (QAHE) for technological applications. While most studies have focused on doping magnetic impurities to open a gap at the surface-state Dirac point, many undesirable effects have been reported to appear in some cases...

Two- and three-dimensional topological insulators are the key materials for the future nanoelectronic and spintronic devices and quantum computers. By means of angle- and spin-resolved photoemission spectroscopy we study the electronic and spin structure of the Bi-bilayer/3D topological insulator in quantum tunneling regime formed under the short a...

The quantum spin Hall insulators predicted ten years ago and now experimentally observed are
instrumental for a break- through in nanoelectronics due to non-dissipative spin-polarized electron
transport through their edges. For this transport to persist at normal conditions, the insulators
should possess a sufficiently large band gap in a stable to...

Based on the relativistic spin-polarized density functional theory calculations we investigate the crystal structure, electronic and magnetic properties of a family compounds, where pnictogen metal atoms are Sb and Bi; chalcogens are Se, Te. We show that in the series the compounds of this family with heavier elements prefer to adopt rhombohedral c...

Changes of the electronic band structure of Bi(111) films on Si(111) induced by Cs and Sn adsorption have been studied using angle-resolved photoemission spectroscopy and density functional calculations. It has been found that small amounts of Cs when it presents at the surface in a form of the adatom gas leads to shifting of the surface and quantu...

On the base of density functional theory calculations we investigate the atomic hydrogen adsorption on Cl- and Te-terminations of giant Rashba-split semiconductor BiTeCl and show that it leads to removal of the halogen and chalcogen top layer atoms by means of desorption of HCl and H2Te molecules. This mechanism accompanied by swapping of next Bi a...

The Ge2Sb2Te5 is a phase-change material widely used in optical memory devices and is a leading candidate for next generation non-volatile random access memory devices which are key elements of various electronics and portable systems. Despite the compound is under intense investigation its electronic structure is currently not fully understood. Th...

Structural transformations and evolution of the electron band structure in the (Tl, Pb)/Ge(1 1 1) system have been studied using low-energy electron diffraction, scanning tunneling microscopy, angle-resolved photoelectron spectroscopy and density functional theory calculations. The two 2D Tl-Pb compounds on Ge(1 1 1), [Formula: see text]-(Tl, Pb) a...

The growth of Pb ultra-thin films on Cu(111) has been long studied in connection with electronic quantum-size effects and for the different temperature-dependent growth kinetics. At low temperature the formation of a wetting layer (1 monolayer (ML)), is followed by an instability of the 2 ML film and a regular layer-by-layer growth is then only obs...