Critical Behavior of a Point Contact in a Quantum Spin Hall Insulator

Details Critical Behavior of a Point Contact in a Quantum Spin Hall Insulator Critical Behavior of a Point Contact in a Quantum Spin Hall Insulator

2009-04-21

arxiv.org/abs/0904.3109v1

Phys. Rev. B 79, 235321 (2009).

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

23 pages, 11 figures

Scientific paper

We study a quantum point contact in a quantum spin Hall insulator. It has recently been shown that the Luttinger liquid theory of such a structure maps to the theory of a weak link in a Luttinger liquid with spin with Luttinger liquid parameters g_\rho = 1/g_\sigma = g < 1. We show that for 1/2

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