@article{Boboshko2024,
title = {Bilinear magnetoresistance and planar Hall effect in topological insulators: Interplay of scattering on spin-orbital impurities and nonequilibrium spin polarization},
author = {Kateryna Boboshko and Anna Dyrdał},
url = {https://link.aps.org/doi/10.1103/PhysRevB.109.155420},
doi = {10.1103/PhysRevB.109.155420},
year = {2024},
date = {2024-04-15},
journal = {Physical Review B},
volume = {109},
number = {15},
pages = {155420},
abstract = {We have considered theoretically nonlinear transport phenomena known as bilinear magnetoresistance (BMR) and nonlinear planar Hall effect (NPHE) within the effective model describing surface states of a 3D topological insulator. Both phenomena can occur in nonmagnetic materials with strong spin-orbit interaction and reveal a term that depends linearly on the charge current density (external electric field) and in-plane magnetic field. In earlier studies, the physical mechanism of BMR and NPHE was related to scattering on spin-momentum locking inhomogeneities or to the hexagonal warping of Dirac cones. Here, we focus on another mechanism related to scattering on impurities that inherently contain spin-orbit coupling. Using the Green's function formalism and diagramatic method, we have derived analytical results for diagonal and transverse conductivities and determined nonlinear signals. The analytical and numerical results on BMR and NPHE indicate the possibility of determining the material constants, such as the Fermi wave vector and spin-orbit coupling parameter, by simple magnetotransport measurements.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}

@article{Boboshko2022,
title = {Bilinear magnetoresistance in topological insulators: The role of spin–orbit scattering on impurities},
author = {Kateryna Boboshko and Anna Dyrdał and Józef Barnaś},
url = {https://www.sciencedirect.com/science/article/pii/S0304885321009318},
doi = {10.1016/j.jmmm.2021.168698},
year = {2022},
date = {2022-03-01},
journal = {Journal of Magnetism and Magnetic Materials},
volume = {545},
pages = {168698},
abstract = {Bilinear magnetoresistance (BMR) is a new kind of magnetoresistance, that scales linearly with electric and magnetic fields. This magnetoresistance occurs in systems with strong spin–orbit interaction. Additionally, this interaction also leads to quadratic magnetoresistance (QMR). We consider theoretically BMR and QMR in surface states of 3D topological insulators, and propose a new mechanism that leads to these effects. This mechanism is based on scattering on spin–orbit impurities. Accordingly, we assume the minimal model of surface electronic states in a single independent surface of a TI, and calculate both BMR and QMR induced as an interplay of current-induced spin polarization (or equivalently effective spin–orbit field) and spin–orbit scattering on impurities. We present detailed characteristics of both BMR and QMR, and compare our results with those obtained for TIs with spin-momentum locking inhomogeneities and hexagonal warping of the Dirac cones.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}