论文标题
带量子自旋霍尔边缘状态的电探测的单旋链共振
Electrically-detected single-spin resonance with Quantum Spin Hall edge states
论文作者
论文摘要
检测通常是减少顺磁共振实验中旋转数量的主要障碍。在这里，我们提出了一条新的途径，以进行单个自旋的电旋转共振，放置在量子旋转厅绝缘子（QSHI）的边缘。 QSHI的边缘带有一个一维电子气体，具有完美的自旋摩托锁定。因此，通过QSHI边缘状态的电子孔对发射引起的自旋松弛会产生电流。在这里，我们证明了使用$ AC $信号驾驶系统，在没有应用偏置电压的情况下，可以诱导非平衡职业，从而导致$ DC $可测量的电流。我们计算$ dc $当前的电流，该电流是Rabi频率$ω$，旋转放松和变形时间，$ t_1 $的函数，我们与最先进的仪器讨论了该实验的可行性。
Detection is most often the main impediment to reduce the number of spins in paramagnetic resonance experiments. Here we propose a new route to carry out electrically-detected spin resonance of an individual spin, placed at the edge of a quantum spin Hall insulator (QSHI). The edges of a QSHI host a one dimensional electron gas with perfect spin-momentum locking. Therefore, the spin relaxation induced by emission of an electron-hole pair at the edge state of the QSHI can generate current. Here we demonstrate that driving the system with an $AC$ signal, a nonequilibrium occupation can be induced in the absence of applied bias voltage, resulting in a $DC$ measurable current. We compute the $DC$ current as a function of the Rabi frequency $Ω$, the spin relaxation and decoherence times, $T_1$ and we discuss the feasibility of this experiment with state-of-the-art instrumentation.
