| Title: |
Theory of bi-linear magnetoresistance within the minimal model for surface states in topological insulators |
| Authors: |
Dyrdał, A., Barnaś, J., Fert, A. |
| Source: |
Phys. Rev. Lett. 124, 046802 (2020) |
| Publication Year: |
2019 |
| Collection: |
Condensed Matter |
| Subject Terms: |
Condensed Matter - Mesoscale and Nanoscale Physics |
| More Details: |
A new mechanism of bi-linear magnetoresistance (BMR) is studied theoretically within the minimal model describing surface electronic states in topological insulators (TIs). The BMR appears as a consequence of the second-order response to electric field, and depends linearly on both electric field (current) and magnetic field. The mechanism is based on the interplay of current-induced spin polarization and scattering processes due to peculiar spin-orbit defects. The proposed mechanism is compared to that based on a Fermi surface warping, and is shown to be dominant at lower Fermi energies. We provide a consistent theoretical approach based on the Green function formalism and show that the magnetic field dependent relaxation processes in the presence of non-equilibrium current-induced spin polarization give rise to the BMR. |
| Document Type: |
Working Paper |
| DOI: |
10.1103/PhysRevLett.124.046802 |
| Access URL: |
http://arxiv.org/abs/1908.08575 |
| Accession Number: |
edsarx.1908.08575 |
| Database: |
arXiv |
