论文标题
量子旋转大厅效应的相互作用和电子孔双层中的自发时间反转对称性破裂I：传输属性
Interplay of quantum spin Hall effect and spontaneous time-reversal symmetry breaking in electron-hole bilayers I: Transport properties
论文作者
论文摘要
由于电子和孔的密度较小，电子和孔带之间相对较小的杂交，因此带回传递的电子孔双层（例如INAS/GASB）是一个有趣的操场。已经提出，当将电子和孔密度从微不足道调谐到量子自旋霍尔绝缘子状态时，库仑相互作用会导致时间反转对称性相。我们表明，在时间反转对称相中，系统的传输特性与INAS/GASB中最近的实验观察结果一致。此外，我们对Corbino圆盘进行了量子运输研究，可以分离对电导的大体和边缘贡献。我们表明，当一个人从微不足道到量子旋转厅绝缘子阶段调谐系统时，边缘会变得平稳，并且总体始终是绝缘的，从而提供了时间反向对称性损坏相的明确传输签名。
The band-inverted electron-hole bilayers, such as InAs/GaSb, are an interesting playground for the interplay of quantum spin Hall effect and correlation effects because of the small density of electrons and holes and the relatively small hybridization between the electron and hole bands. It has been proposed that Coulomb interactions lead to a time-reversal symmetry broken phase when the electron and hole densities are tuned from the trivial to the quantum spin Hall insulator regime. We show that the transport properties of the system in the time-reversal symmetry broken phase are consistent with the recent experimental observations in InAs/GaSb. Moreover, we carry out a quantum transport study on a Corbino disc where the bulk and edge contributions to the conductance can be separated. We show that the edge becomes smoothly conducting and the bulk is always insulating when one tunes the system from the trivial to the quantum spin Hall insulator phase, providing unambiguous transport signatures of the time-reversal symmetry broken phase.
