Anisotropic spin transport in two-terminal mesoscopic rings: the Rashba and Dresselhaus spin-orbit interactions

TL;DR

This paper theoretically explores how the interplay of Rashba and Dresselhaus spin-orbit interactions causes anisotropic spin transport in mesoscopic rings, with conductance depending on lead positions and persisting despite disorder.

Contribution

It reveals that combined spin-orbit interactions break cylindrical symmetry, leading to anisotropic conductance sensitive to lead placement in mesoscopic rings.

Findings

Anisotropic spin transport arises from RSOI and DSOI interplay.

Conductance depends on lead positions due to symmetry breaking.

Anisotropic effects persist despite impurity scattering.

Abstract

We investigate theoretically the spin transport in two-terminal mesoscopic rings in the presence of both the Rashba spin-orbit interaction (RSOI) and the Dresselhaus spin-orbit interaction (DSOI). We find that the interplay between the RSOI and DSOI breaks the original cylindric symmetry of mesoscopic ring and consequently leads to the anisotropic spin transport, i.e., the conductance is sensitive to the positions of the incoming and outgoing leads. The anisotropic spin transport can survive even in the presence of disorder caused by impurity elastic scattering in a realistic system.