Spin-charge separation in Aharonov-Bohm rings of interacting electrons

TL;DR

This paper studies how strong electron interactions in a flux-threaded ring cause spin-charge separation, leading to distinctive interference patterns observable in Aharonov-Bohm experiments.

Contribution

It demonstrates the occurrence of spin-charge separation effects in a nanoscopic ring connected to leads, revealing new interference phenomena.

Findings

Sharp dips in interference pattern at specific flux values

Spin-charge separation causes observable effects in small systems

Flux-dependent interference patterns linked to electron filling

Abstract

We investigate the properties of strongly correlated electronic models on a flux-threaded ring connected to semi-infinite free-electron leads. The interference pattern of such an Aharonov-Bohm ring shows sharp dips at certain flux values, determined by the filling, which are a consequence of spin-charge separation in a nanoscopic system.