88 citations · 405 across the 27 of their papers we have counts for
27 papers
Tunneling characteristics of twisted double bilayer graphene heterostructures
Alexey A. Sokolik, Azat F. Aminov, Evgenii E. Vdovin +5
Electron tunneling between sheets of bilayer Bernal graphene twisted at different small angles was studied experimentally and theoretically. The current-voltage characteristics exh…
Probing the features of electron dispersion by tunneling between slightly twisted bilayer graphene sheets
Alexey A. Sokolik, Azat F. Aminov, Evgenii E. Vdovin +6
Tunneling conductance between two bilayer graphene (BLG) sheets separated by 2 nm-thick insulating barrier was measured in two devices with the twist angles between BLGs less than…
Hybridization of edge modes with substrate phonons
Azat F. Aminov, Alexey A. Sokolik
Surface plasmons or phonons propagating on a two-dimensional (2D) material can exhibit coupling with resonant excitations in its substrate, and the resulting coupled modes were ext…
Terahertz electro-optic effect in BiSe crystals
A. A. Melnikov, A. A. Sokolik, Yu. G. Selivanov +1
We report the observation of the electro-optic effect in BiSe crystals induced by an intense single-cycle terahertz pulse. The effect reveals itself as a transient change o…
Bose-Einstein condensation in canonical ensemble with fixed total momentum
Andrey S. Plyashechnik, Alexey A. Sokolik, Yurii E. Lozovik
We consider Bose-Einstein condensation of noninteracting homogeneous three-dimensional gas in canonical ensemble when both particle number and total momentum of al…
Finite-frequency normal and superfluid drag effects in two-component atomic Bose-Einstein condensates
Azat F. Aminov, Alexey A. Sokolik, Yurii E. Lozovik
Two-component systems consisting of mutually interacting particles can demonstrate both intracomponent transport effects and intercomponent entrainment (or drag) effects. In the pr…
Drift velocity of edge magnetoplasmons due to magnetic edge channels
Alexey A. Sokolik, Yurii E. Lozovik
Edge magnetoplasmons arise on a boundary of conducting layer in perpendicular magnetic field due to an interplay of electron cyclotron motion and Coulomb repulsion. Lateral electri…
Superconductor-polariton non-dissipative drag in optical microcavity
Azat F. Aminov, Alexey A. Sokolik, Yurii E. Lozovik
We consider non-dissipative drag between Bose-condensed exciton polaritons in optical microcavity and embedded superconductors. This effect consists in induction of a non-dissipati…
Coupled system of electrons and exciton-polaritons: Screening, dynamical effects, and superconductivity
Andrey S. Plyashechnik, Alexey A. Sokolik, Nina S. Voronova +1
Bose-Fermi systems such as mixtures of electrons with excitons or exciton-polaritons are extensively discussed as candidates to host a variety of intriguing phenomena, including po…
Superfluid drag between excitonic polaritons and superconducting electron gas
Azat F. Aminov, Alexey A. Sokolik, Yurii E. Lozovik
The Andreev-Bashkin effect, or superfluid drag, is predicted in a system of Bose-condensed excitonic polaritons in optical microcavity coupled by electron-exciton interaction with…
Plasmonic modes at inclined edges of anisotropic 2D materials
A. A. Sokolik, O. V. Kotov, Yu. E. Lozovik
Confined modes at the edge arbitrarily inclined with respect to optical axes of nonmagnetic anisotropic 2D materials are considered. By developing the exact Wiener-Hopf and approxi…
Virial theorem, boundary conditions, and pressure for massless Dirac electrons
Alexey A. Sokolik, Andrey D. Zabolotskiy, Yurii E. Lozovik
The virial and the Hellmann--Feynman theorems for massless Dirac electrons in a solid are derived and analyzed using generalized continuity equations and scaling transformations. B…
Edge magnetoplasmons in graphene: Effects of gate screening and dissipation
Alexey A. Sokolik, Yurii E. Lozovik
Magnetoplasmons on graphene edge in quantizing magnetic field are investigated at different Landau level filling factors. To find the mode frequency, the optical conductivity tenso…
Many-body filling-factor dependent renormalization of Fermi velocity in graphene in strong magnetic field
Alexey A. Sokolik, Yurii E. Lozovik
We present the theory of many-body corrections to cyclotron transition energies in graphene in strong magnetic field due to Coulomb interaction, considered in terms of the renormal…
Many-body renormalization of Landau levels in graphene due to screened Coulomb interaction
Alexey A. Sokolik, Yurii E. Lozovik
Renormalization of Landau level energies in graphene in strong magnetic field due to Coulomb interaction is studied theoretically, and calculations are compared with two experiment…
Many-body effects of Coulomb interaction on Landau levels in graphene
A. A. Sokolik, A. D. Zabolotskiy, Yu. E. Lozovik
In strong magnetic fields, massless electrons in graphene populate relativistic Landau levels with the square-root dependence of each level energy on its number and magnetic field.…
Generalized virial theorem for massless electrons in graphene and other Dirac materials
A. A. Sokolik, A. D. Zabolotskiy, Yu. E. Lozovik
The virial theorem for a system of interacting electrons in a crystal, which is described within the framework of the tight-binding model, is derived. We show that, in particular c…
Quantum capacitance and compressibility of graphene: The role of Coulomb interactions
Yu. E. Lozovik, A. A. Sokolik, A. D. Zabolotskiy
Many-body effects on quantum capacitance, compressibility, renormalized Fermi velocity, kinetic and interaction energies of massless Dirac electrons in graphene, induced by the Cou…
Electron-hole pairing in topological insulator thin film
D. K. Efimkin, Yu. E. Lozovik, A. A. Sokolik
We consider pairing of massless Dirac electrons and holes located on opposite surfaces of thin film of "strong" three-dimensional topological insulator. Such pairing was predicted…
Cooper pairing of electrons and holes in graphene bilayer: Correlation effects
Yu. E. Lozovik, S. L. Ogarkov, A. A. Sokolik
Cooper pairing of spatially separated electrons and holes in graphene bilayer is studied beyond the mean-field approximation. Suppression of the screening at large distances, cause…
Influence of Landau level mixing on the properties of elementary excitations in graphene in strong magnetic field
Yu. E. Lozovik, A. A. Sokolik
Massless Dirac electrons in graphene fill Landau levels with energies scaled as square roots of their numbers. Coulomb interaction between electrons leads to mixing of different La…
Collective excitations on a surface of topological insulator
D. K. Efimkin, Yu. E. Lozovik, A. A. Sokolik
We study collective excitations in a helical electron liquid on a surface of three-dimensional topological insulator. Electron in helical liquid obeys Dirac-like equation for massl…
Spin-plasmons in topological insulator
D. K. Efimkin, Yu. E. Lozovik, A. A. Sokolik
Collective plasmon excitations in a helical electron liquid on the surface of strong three-dimensional topological insulator are considered. The properties and internal structure o…
Electron-electron and electron-hole pairing in graphene structures
Yu. E. Lozovik, S. L. Ogarkov, A. A. Sokolik
The superconducting pairing of electrons in doped graphene due to in-plane and out-of-plane phonons is considered. It is shown that the structure of the order parameter in the vall…