Crystal orientation dependence of the spin-orbit coupling in InAs nanowires
Abstract
We compare the spin-orbit interaction (SOI) in InAs nanowires grown in the conventional 〈0001 〉 crystal direction and the perpendicular 〈01 1 ¯0 〉 direction. It is theoretically shown that, for individual transverse modes, the intrinsic contribution due to the bulk inversion asymmetry of the crystal vanishes for wires in the 〈0001 〉 direction but remains finite for 〈01 1 ¯0 〉 . Experimental spin-orbit scattering lengths extracted from low-temperature magnetoresistance measurements of individual nanowires yields, however, comparable values in the two cases, suggesting that the intrinsic intramode spin-orbit term is not the dominant source of the SOI. We discuss the implications for the manipulation of SOI in nanowire devices.
- Publication:
-
Physical Review B
- Pub Date:
- January 2018
- DOI:
- 10.1103/PhysRevB.97.041303
- Bibcode:
- 2018PhRvB..97d1303J