arXiv subjects

S. Kudła

Publications and source records attributed to S. Kudła.

2 recordsLinked to original sources

arXiv2024

Longitudinal magnetoresistance in graphene with random Rashba spin-orbit interaction

We consider longitudinal electronic transport in a graphene monolayer with an external in-plane magnetic field and with extrinsic spin-orbit Rashba interaction. Our main interest is in the in-plane magnetoresistance, observed experimentally. We show, that scattering on Rashba spin-orbit fluctuations leads to a negative magnetoresistance, in agreement with experimental observations. To calculate transport properties we assume an effective model valid for low energy states around the Dirac points, and use the Green function method to derive the electron scattering rate and longitudinal conductivity.

cond-mat.mes-hall↗

arXiv2019

Conduction of surface electrons in a topological insulator with spatially random magnetization

Using the Green functions method we study transport properties of surface electrons in topological insulators in the presence of a correlated random exchange field. Such an exchange field may be due to random magnetization with correlated fluctuations. We determine the relaxation time due to scattering from the magnetization fluctuations and from other structural defects. Then we calculate the longitudinal charge conductivity taking into account the contribution due to vertex correction.

cond-mat.mes-hall↗