Corner junction as a probe of helical edge states
Abstract
We propose and analyze interedge 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 from 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. © 2009 The American Physical Society.
Date Published
Journal
Physical Review Letters
Volume
102
Issue
7
URL
https://www.scopus.com/inward/record.uri?eid=2-s2.0-61349090561&doi=10.1103%2fPhysRevLett.102.076602&partnerID=40&md5=ddcd05ec760aea88df08b28160881fe0
DOI
10.1103/PhysRevLett.102.076602