Observation of a Helical Luttinger-Liquid in InAs/GaSb Quantum Spin Hall Edges
| Autor: | Li, Tingxin, Wang, Pengjie, Fu, Hailong, Du, Lingjie, Schreiber, Kate A., Mu, Xiaoyang, Liu, Xiaoxue, Sullivan, Gerard, Csáthy, Gábor A., Lin, Xi, Du, Rui-Rui |
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| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | Phys. Rev. Lett. 115 136804 (2015) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevLett.115.136804 |
| Popis: | 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. Comment: 23 pages, 9 figures |
| Databáze: | arXiv |
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