474 citations · 2.4k across the 57 of their papers we have counts for
45 papers · 1 filter
Heat transport in Weyl semimetals in the hydrodynamic regime
Yonatan Messica, Pavel M. Ostrovsky, Dmitri B. Gutman
We study heat transport in a Weyl semimetal with broken time-reversal symmetry in the hydrodynamic regime. At the neutrality point, the longitudinal heat conductivity is governed b…
Anomalous Hall effect in disordered Weyl semimetals
Yonatan Messica, Dmitri. B. Gutman, Pavel M. Ostrovsky
We study the anomalous Hall effect in a disordered Weyl semimetal. While the intrinsic contribution is expressed solely in terms of Berry curvature, the extrinsic contribution is g…
Anderson localization at the boundary of a two-dimensional topological superconductor
Daniil S. Antonenko, Eslam Khalaf, Pavel M. Ostrovsky +1
A one-dimensional boundary of a two-dimensional topological superconductor can host a number of topologically protected chiral modes. Combining two topological superconductors with…
Mesoscopic conductance fluctuations and noise in disordered Majorana wires
Daniil S. Antonenko, Eslam Khalaf, Pavel M. Ostrovsky +1
Superconducting wires with broken time-reversal and spin-rotational symmetries can exhibit two distinct topological gapped phases and host bound Majorana states at the phase bounda…
Anisotropy of spin-transfer torques and Gilbert damping induced by Rashba coupling
I. A. Ado, P. M. Ostrovsky, M. Titov
Spin-transfer torques (STT), Gilbert damping (GD), and effective spin renormalization (ESR) are investigated microscopically in a 2D Rashba ferromagnet with spin-independent Gaussi…
Spin-torque resonance due to diffusive dynamics at a surface of topological insulator
R. J. Sokolewicz, I. A. Ado, M. I. Katsnelson +2
We investigate spin-orbit torques on magnetization in an insulating ferromagnetic (FM) layer that is brought into a close proximity to a topological insulator (TI). In addition to…
Mesoscopic supercurrent fluctuations in diffusive magnetic Josephson junctions
P. A. Ioselevich, P. M. Ostrovsky, Ya. V. Fominov
We study the supercurrent in quasi-one-dimensional Josephson junctions with a weak link involving magnetism, either via magnetic impurities or via ferromagnetism. In the case of we…
Robust weak antilocalization due to spin-orbital entanglement in Dirac material SrSnO
H. Nakamura, D. Huang, J. Merz +5
The presence of both inversion () and time-reversal () symmetries in solids leads to a well-known double degeneracy of the electronic bands (Kramers degeneracy). When the deg…
Dynamics of Anderson localization in disordered wires
E. Khalaf, P. M. Ostrovsky
We consider the dynamics of an electron in an infinite disordered metallic wire. We derive exact expressions for the probability of diffusive return to the starting point in a give…
Ultrafast lithium diffusion in bilayer graphene
M. Kühne, F. Paolucci, J. Popovic +3
Solid mixed conductors with significant ionic as well as electronic conduction play a pivotal role for mass transfer and storage as required in battery electrodes. Single-phase mat…
Cooper pair splitting in diffusive magnetic SQUIDs
P. A. Ioselevich, P. M. Ostrovsky, Ya. V. Fominov +1
We study Josephson junctions with weak links consisting of two parallel disordered arms with magnetic properties -- ferromagnetic, half-metallic or normal with magnetic impurities.…
Boundary scattering effects on magnetotransport of narrow metallic wires and films
E. Khalaf, P. M. Ostrovsky
Electron transport in thin metallic wires and films is strongly influenced by the quality of their surface. Weak localization and magnetoconductivity are also sensitive to the elec…
Anomalous Hall Effect on the surface of topological Kondo insulators
E. J. König, P. M. Ostrovsky, M. Dzero +1
We calculate the anomalous Hall conductivity of the surface states {in cubic topological Kondo insulators}. We consider a generic model for the surface states with three D…
Semiclassical electron transport at the edge of a 2D topological insulator: Interplay of protected and unprotected modes
E. Khalaf, M. A. Skvortsov, P. M. Ostrovsky
We study electron transport at the edge of a generic disordered two-dimensional topological insulator, where some channels are topologically protected from backscattering. Assuming…
Josephson current between topological and conventional superconductors
P. A. Ioselevich, P. M. Ostrovsky, M. V. Feigelman
We study the stationary Josephson current in a junction between a topological and an ordinary (topologically trivial) superconductor. Such an S-TS junction hosts a Majorana zero mo…
Quantum interference in HgTe structures
I. V. Gornyi, V. Yu. Kachorovskii, A. D. Mirlin +1
We study quantum transport in HgTe/HgCdTe quantum wells under the condition that the chemical potential is located outside of the bandgap. We first analyze symmetry properties of t…
Half-integer quantum Hall effect of disordered Dirac fermions at a topological insulator surface
E. J. König, P. M. Ostrovsky, I. V. Protopopov +3
The unconventional (half-integer) quantum Hall effect for a single species of Dirac fermions is analyzed. We discuss possible experimental measurements of the half-integer Hall con…
Density of states in a two-dimensional chiral metal with vacancies
P. M. Ostrovsky, I. V. Protopopov, E. J. König +3
We study quantum interference effects in a two-dimensional chiral metal (bipartite lattice) with vacancies. We demonstrate that randomly distributed vacancies constitute a peculiar…
Interference-induced magnetoresistance in HgTe quantum wells
I. V. Gornyi, V. Yu. Kachorovskii, P. M. Ostrovsky
We study the quantum interference correction to the conductivity in HgTe quantum wells using the Bernevig-Hughes-Zhang model. This model consists of two independent species (blocks…
Quantum Hall criticality and localization in graphene with short-range impurities at the Dirac point
S. Gattenloehner, W. -R. Hannes, P. M. Ostrovsky +3
We explore the longitudinal conductivity of graphene at the Dirac point in a strong magnetic field with two types of short-range scatterers: adatoms that mix the valleys and "scala…
Interaction and disorder effects in 3D topological insulator thin films
E. J. König, P. M. Ostrovsky, I. V. Protopopov +3
A theory of combined interference and interaction effects on the diffusive transport properties of 3D topological insulator surface states is developed. We focus on a slab geometry…
Quantum Corrections to the Polarizability and Dephasing in Isolated Disordered Metals
M. Treiber, P. M. Ostrovsky, O. M. Yevtushenko +2
We study the quantum corrections to the polarizability of isolated metallic mesoscopic systems using the loop-expansion in diffusive propagators. We show that the difference betwee…
Superconducting proximity effect in quantum wires without time-reversal symmetry
M. A. Skvortsov, P. M. Ostrovsky, D. A. Ivanov +1
We study the superconducting proximity effect in a quantum wire with broken time-reversal (TR) symmetry connected to a conventional superconductor. We consider the situation of a s…
Symmetries and weak (anti)localization of Dirac fermions in HgTe quantum wells
P. M. Ostrovsky, I. V. Gornyi, A. D. Mirlin
We perform a symmetry analysis of a 2D electron system in HgTe/HgCdTe quantum wells in the situation when the chemical potential is outside of the gap, so that the bulk of the quan…