Zobrazeno 1 - 10
of 358
pro vyhledávání: '"Loktev, V. M."'
Radiative corrections which remove accidental degeneracy in the spectrum of the relativistic hydrogen atom and lead to the modification of the Coulomb law, are calculated within the novel approach, based on the exact solution of the Dirac equation wi
Externí odkaz:
http://arxiv.org/abs/2406.03350
Autor:
Pogorelov, Y. G., Loktev, V. M.
We consider electronic spectra of graphene nanotubes and their perturbation by impurity atoms absorbed at different positions on nanotube surfaces, within the framework of Anderson hybrid model. A special attention is given to the cases when Dirac-li
Externí odkaz:
http://arxiv.org/abs/2312.05812
It is shown that the Dirac equation with the Coulomb potential can be solved using the algebra of the three spinor invariants of the Dirac equation without the involvement of the methods of supersymmetric quantum mechanics. The Dirac Hamiltonian is i
Externí odkaz:
http://arxiv.org/abs/2211.01857
Solutions of the Dirac equation for an electron in the Coulomb potential are obtained using operator invariants of the equation, namely the Dirac, Johnson-Lippmann and recently found new invariant. It is demonstrated that these operators are the spin
Externí odkaz:
http://arxiv.org/abs/2111.08552
Autor:
Bugrij, A. I., Loktev, V. M.
The ideal Bose-gas with finite number $N$ of particles is investigated. The exact expressions for the partition functions and occupation numbers in the grand canonical, canonical and microcanonical ensembles are found. The asymp\-totic expressions (i
Externí odkaz:
http://arxiv.org/abs/2011.04625
The Dirac equation with the Coulomb potential is studied. It is shown that there exists a new invariant in addition to the known Dirac and Johnson-Lippman ones. The solution of the Dirac equation, using the generalized invariant, and explicit express
Externí odkaz:
http://arxiv.org/abs/2009.09838
Orbital susceptibility of T-graphene: Interplay of high-order van Hove singularities and Dirac cones
Publikováno v:
Phys. Rev. B 103, 195104 (2021)
Square-octagon lattice underlies the description of a family of two-dimensional materials such as tetragraphene. In the present paper we show that the tight-binding model of square-octagon lattice contains both conventional and high-order van Hove po
Externí odkaz:
http://arxiv.org/abs/2009.05612
Publikováno v:
Condens. Matter Phys., 2020, vol. 23, No. 2, 23608
The description of the collective magnetorheological effect induced by magnetic field in magnetoactive elastomers is proposed. The condition of consistency is used between magnetic and mechanic momenta of forces exerted on magnetically uniaxial ferro
Externí odkaz:
http://arxiv.org/abs/2005.12736
Publikováno v:
Ukrainian Journal of Physics, 2019. Vol. 64, No. 6, pp. 464-476
In frame of Dirac quantum field theory that describes electrons and positrons as elementary excitations of the spinor field, the generalized operator of the spin-orbit interaction is obtained using non-relativistic approximation in the Hamilton opera
Externí odkaz:
http://arxiv.org/abs/2003.14245
Publikováno v:
Phys. Rev. B 99, 235421 (2019)
An explanation is proposed for the recently observed in optical spectra of monolayer graphene giant increase in the Drude peak width under applied uniaxial strain. We argue that the underlying mechanism of this increase can be based on resonant scatt
Externí odkaz:
http://arxiv.org/abs/1903.10363