Zobrazeno 1 - 10
of 124
pro vyhledávání: '"Finkel'stein, A. M."'
Publikováno v:
Phys. Rev. B 107, L180404 (2023)
The magnonic crystal, which has a spatial modulation wave vector $q$, couples the spin wave with wave vector $k$ to the one with wave vector $k-q$. For a conventional magnonic crystal with direct current (dc) supply, the spin waves around $q/2$ are r
Externí odkaz:
http://arxiv.org/abs/2305.09876
Publikováno v:
Phys. Rev. B 105, 214409 (2022)
We develop a description of spin waves in a $3D$ quantum $XY$ antiferromagnet (AFM) in terms of macroscopic variables, magnetization and N\'eel vector densities. We consider a layered AFM with spins located on the honeycomb lattice. In the discussed
Externí odkaz:
http://arxiv.org/abs/2304.00700
Autor:
Finkel'stein, A. M., Schwiete, G.
We review the scaling theory of disordered itinerant electrons with e-e interactions. We first show how to adjust the microscopic Fermi-liquid theory to the presence of disorder. Then we describe the non-linear sigma model (NLSM) with interactions (F
Externí odkaz:
http://arxiv.org/abs/2303.00655
Publikováno v:
Phys. Rev. B 105, L020404 (2022)
We suggest using spatially modulated strain for control of a spin wave propagating inside a bulk magnet. The modulation with the wave vector $q=2k$, by virtue of magnetoelasticity, mixes spin waves with wave vectors near $k$ and $-k$. This leads to l
Externí odkaz:
http://arxiv.org/abs/2201.02691
Publikováno v:
Phys. Rev. B 101, 241401(R) (2020)
We discuss valley current, which is carried by quasiparticles in graphene. We show that the valley current arises owing to a peculiar term in the electron-phonon collision integral that mixes the scalar and vector gauge-field-like vertices in the ele
Externí odkaz:
http://arxiv.org/abs/2005.10459
Publikováno v:
Phys.Rev.B 105, 214523 (2022)
We consider a two-dimensional disordered conductor in the regime when the superconducting phase is destroyed by the magnetic field. We analyze a combination of fluctuations of different origin which results in an effective interaction amplitude suita
Externí odkaz:
http://arxiv.org/abs/1912.04258
Publikováno v:
Phys. Rev. Research 2, 013148 (2020)
Electric, thermal and thermoelectric transport in correlated electron systems probe different aspects of the many-body dynamics, and thus provide complementary information. These are well studied in the low- and high-temperature limits, while the exp
Externí odkaz:
http://arxiv.org/abs/1910.07642
Publikováno v:
Scientific reports 8 (1), 16256 (2018)
We identify graphene layer on a disordered substrate as a possible system where Anderson localization of phonons can be observed. Generally, observation of localization for scattering waves is not simple, because the Rayleigh scattering is inversely
Externí odkaz:
http://arxiv.org/abs/1712.09608
Autor:
Schwiete, G., Finkel'stein, A. M.
We study thermal conductivity in the disordered two-dimensional electron liquid in the presence of long-range Coulomb interactions. We describe a microscopic analysis of the problem using as a starting point the partition function defined on the Keld
Externí odkaz:
http://arxiv.org/abs/1510.06529
Autor:
Schwiete, G., Finkel'stein, A. M.
Publikováno v:
Phys. Rev. B 93, 115121 (2016)
We study the thermal conductivity of the disordered two-dimensional electron gas. To this end we analyze the heat density-heat density correlation function concentrating on the scattering processes induced by the Coulomb interaction in the sub-temper
Externí odkaz:
http://arxiv.org/abs/1509.02519