标题： 拓扑Kondo绝缘体SmB6表面态中的自旋注入和逆爱德斯坦效应 显示英文标题

标题： Spin Injection and Inverse Edelstein Effect in the Surface States of Topological Kondo Insulator SmB6

摘要： 对利用电子自旋自由度用于潜在的信息存储和计算技术的兴趣已经相当浓厚。 拓扑绝缘体（TI），一类量子材料，具有特殊的无能隙边缘/表面态，其中狄拉克费米子的自旋极化与动量方向锁定。 这种自旋-动量锁定特性引发了非常有趣的自旋依赖物理现象，如埃德林斯坦效应和逆埃德林斯坦效应。 然而，在纯表面态中进行自旋注入非常具有挑战性，因为高导电性的体态同时存在。 在此，我们实验上展示了自旋注入，并在拓扑科恩达绝缘体SmB6的表面态中观察到了逆埃德林斯坦效应。 在低温下只有表面载流子存在时，观察到了清晰的自旋信号。 此外，自旋信号的磁场角度依赖性与SmB6表面态的自旋-动量锁定特性一致。 显示英文摘要

摘要： There has been considerable interest in exploiting the spin degrees of freedom of electrons for potential information storage and computing technologies. Topological insulators (TI), a class of quantum materials, have special gapless edge/surface states, where the spin polarization of the Dirac fermions is locked to the momentum direction. This spin-momentum locking property gives rise to very interesting spin-dependent physical phenomena such as the Edelstein and inverse Edelstein effects. However, the spin injection in pure surface states of TI is very challenging because of the coexistence of the highly conducting bulk states. Here, we experimentally demonstrate the spin injection and observe the inverse Edelstein effect in the surface states of a topological Kondo insulator, SmB6. At low temperatures when only surface carriers are present, a clear spin signal is observed. Furthermore, the magnetic field angle dependence of the spin signal is consistent with spin-momentum locking property of surface states of SmB6.