Zobrazeno 1 - 10
of 90
pro vyhledávání: '"Fialkovsky, I."'
Publikováno v:
Phys. Rev. B, 104, 195431 (2021)
Exploiting methods of Quantum Field Theory we compute the bulk polarization tensor and bulk dielectric functions for Dirac materials in the presence of a mass gap, chemical potential, and finite temperature. Using these results (and neglecting eventu
Externí odkaz:
http://arxiv.org/abs/2107.10369
Publikováno v:
Journal of Computational Electronics 20, 2255 - 2283 (2021)
We discuss the non-equilibrium dynamics of condensed matter/quantum field systems in the framework of Keldysh technique. In order to deal with the inhomogeneous systems we use the Wigner-Weyl formalism. Unification of the mentioned two approaches is
Externí odkaz:
http://arxiv.org/abs/2009.10704
Autor:
Fialkovsky, I. V., Zubkov, M. A.
We propose a new version of Wigner-Weyl calculus for tight-binding lattice models. It allows to express various physical quantities through Weyl symbols of operators and Green's functions. In particular, Hall conductivity in the presence of varying a
Externí odkaz:
http://arxiv.org/abs/1912.02786
Publikováno v:
Physica Scripta 95 (6), 064003 (2020)
It is well known that the quantum Hall conductivity in the presence of constant magnetic field is expressed through the topological TKNN invariant. The same invariant is responsible for the intrinsic anomalous quantum Hall effect (AQHE), which, in ad
Externí odkaz:
http://arxiv.org/abs/1910.04730
Autor:
Fialkovsky, I. V., Zubkov, M. A.
Publikováno v:
International Journal of Modern Physics A (2020)
We establish topological nature of Hall conductivity of graphene and other $Z_2$ crystals in 2D and 3D in the presence of inhomogeneous perturbations. To this end the lattice Weyl-Wigner formalism is employed. The non-uniform mechanical stress is con
Externí odkaz:
http://arxiv.org/abs/1910.01585
The Casimir energy is constructed for a system consisting of two semi-infinite slabs of anisotropic material. Each of them is characterized by bulk complex dielectric permittivity tensor and surface conductivity on the free boundary. We found general
Externí odkaz:
http://arxiv.org/abs/1909.07797
Publikováno v:
Phys. Rev. D 100, 045026 (2019)
We study the polarization tensor of a Dirac field in $(3+1)$ dimensions confined to a half space -- a problem motivated by applications to the condensed matter physics, and to Topological Insulators in particular. Although the Pauli-Villars regulariz
Externí odkaz:
http://arxiv.org/abs/1906.06704
Autor:
Fialkovsky, I. V., Zubkov, M. A.
We discuss the tight-binding models of solid state physics with the $Z_2$ sublattice symmetry in the presence of elastic deformations, and their important particular case -the tight binding model of graphene. In order to describe the dynamics of elec
Externí odkaz:
http://arxiv.org/abs/1905.11097
Publikováno v:
Phys. Rev. B 97, 155406 (2018)
We investigate, in the framework of macroscopic Dirac model, the spectrum, charge density and conductivity of metallic armchair graphene nanoribbons in presence of different mass terms. We reveal the conditions and symmetries governing the presence o
Externí odkaz:
http://arxiv.org/abs/1803.02760
Publikováno v:
Phys.Lett. A381 (2017) 2439-2443
We calculate the Casimir interaction of two freestanding graphene samples under uniaxial strain. Our approach fully takes retardation and dispersion into account and is based on quantum field theoretical expressions for conductivities in terms of the
Externí odkaz:
http://arxiv.org/abs/1703.02500