标题： 自旋-轨道控制反转能隙纳米线中的狄拉克点和端态 显示英文标题

标题： Spin-orbit control of Dirac points and end states in inverted gap nanowires

摘要： 我们预测，在具有倒置能带排列的InAs/GaSb纳米线中，横向电场会引发杂化能隙的坍塌，并出现半金属性相。 我们使用自洽的k·p方法和改进的Bernevig-Hughes-Zhang模型来表明，无质量的狄拉克点是由于电子-空穴动能耦合与电场控制的自旋-轨道耦合之间的精确抵消产生的。 端态——局域在有限纳米线两端的中间能隙态——在临界场以内被支持，但当系统穿过半金属性相时，它们突然消失，最终演变为平凡的表面态，这揭示了自旋-轨道诱导的拓扑相变至正常相。 显示英文摘要

摘要： We predict that in InAs/GaSb nanowires with an inverted band alignment a transverse electric field induces a collapse of the hybridization gap, and a semimetal phase occurs. We use a self-consistent k.p approach and an adapted Bernevig-Hughes-Zhang model to show that massless Dirac points result from exact cancellation between the kinetic electron-hole coupling and the field-controlled spin-orbit coupling. End states - mid-gap states localized at the extremes of a finite nanowire - are supported up to a critical field, but suddenly fade away as the system is driven through the semimetal phase, eventually evolving to trivial surface states, which expose a spin-orbit induced topological transition to the normal phase.