Li, TingxinWang, PengjieFu, HailongDu, LingjieSchreiber, Kate A.Mu, XiaoyangLiu, XiaoxueSullivan, GerardCsáthy, Gábor A.Lin, XiDu, Rui-Rui2016-06-102016-06-102015Li, Tingxin, Wang, Pengjie, Fu, Hailong, et al.. "Observation of a Helical Luttinger Liquid in InAs/GaSb Quantum Spin Hall Edges." <i>Physical Review Letters,</i> 115, no. 13 (2015) American Physical Society: 136804. http://dx.doi.org/10.1103/PhysRevLett.115.136804.https://hdl.handle.net/1911/90487We report on the observation of a helical Luttinger liquid in the edge of an 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.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttp://dx.doi.org/10.1103/PhysRevLett.115.136804