High temperature conductance of a two-dimensional superlattice controlled by spin-orbit interaction

TL;DR

This study investigates how Rashba spin-orbit interaction influences the conductance of a two-dimensional superlattice at high temperatures, revealing persistent modulation effects despite thermal effects and dephasing.

Contribution

It demonstrates that SOI can modulate conductance in 2D superlattices at high temperatures, even with strong dephasing, which is novel for practical device applications.

Findings

Conductance modulation persists at high temperatures due to SOI.

Temperature dependence of conductance diminishes at high T.

Strong dephasing does not eliminate SOI effects.

Abstract

Rashba-type spin-orbit interaction (SOI) controlled band structure of a two-dimensional superlattice allows for the modulation of the conductance of finite size devices by changing the strength of the SOI. We consider rectangular arrays and find that the temperature dependence of the conductance disappears for high temperatures, but the strength of the SOI still affects the conductance at these temperatures. The modulation effect can be seen even in the presence of strong dephasing, which can be important in case of practical applications.