Corner Junction as a Probe of Helical Edge States
Mesoscale and Nanoscale Physics
2009-11-13 v1 Strongly Correlated Electrons
Abstract
We propose and analyze inter-edge tunneling in a quantum spin Hall corner junction as a means to probe the helical nature of the edge states. We show that electron-electron interactions in the one-dimensional helical edge states result in Luttinger parameters for spin and charge that are intertwined, and thus rather different than those for a quantum wire with spin rotation invariance. Consequently, we find that the four-terminal conductance in a corner junction has a distinctive form that could be used as evidence for the helical nature of the edge states.
Cite
@article{arxiv.0808.1723,
title = {Corner Junction as a Probe of Helical Edge States},
author = {Chang-Yu Hou and Eun-Ah Kim and Claudio Chamon},
journal= {arXiv preprint arXiv:0808.1723},
year = {2009}
}
Comments
4+ pages, 3 figures