Observation of a Helical Luttinger-Liquid in InAs/GaSb Quantum Spin Hall Edges
Mesoscale and Nanoscale Physics
2015-09-28 v2
Abstract
We report on the observation of a helical Luttinger-liquid in the edge of InAs/GaSb quantum spin Hall insulator, which shows characteristic suppression of conductance at low temperature and low bias voltage. Moreover, the conductance shows power-law behavior as a function of temperature and bias voltage. The results underscore the strong electron-electron interaction effect in transport of InAs/GaSb edge states. Because of the fact that the Fermi velocity of the edge modes is controlled by gates, the Luttinger parameter can be fine tuned. Realization of a tunable Luttinger-liquid offers a one-dimensional model system for future studies of predicted correlation effects.
Keywords
Cite
@article{arxiv.1507.08362,
title = {Observation of a Helical Luttinger-Liquid in InAs/GaSb Quantum Spin Hall Edges},
author = {Tingxin Li and Pengjie Wang and Hailong Fu and Lingjie Du and Kate A. Schreiber and Xiaoyang Mu and Xiaoxue Liu and Gerard Sullivan and Gábor A. Csáthy and Xi Lin and Rui-Rui Du},
journal= {arXiv preprint arXiv:1507.08362},
year = {2015}
}
Comments
23 pages, 9 figures