论文标题
通用的内在高级旋转厅效应
Universal intrinsic higher-rank spin Hall effect
论文作者
论文摘要
自旋霍尔效应（SHE）是一种基本的传输现象，具有非零旋转电流但消失电荷电流，在旋转的旋转中具有重要的应用。由于电子的半自旋性质，旋转电流的等级（由旋转张量的等级确定）限于电荷和自旋霍尔效应的0和1。在固态和冷原子系统中对伪-1费米子的最新研究的激励，我们在这里介绍和表征了大型旋转（$ \ geq 1 $）系统的高级（$ \ geq 2 $）。对于具有固有的自旋轨耦合的自旋-1模型，我们找到了一个通用级别-2旋转霍尔电导率$ e/{8}π$，零等级-0和1电导率。在Spin-3/2系统中也可以找到类似的等级-2 SHE。提出了一种实验方案，以实现和测量伪-1超低的费尔米原子。我们的结果揭示了大型自旋系统中新型的自旋传输现象，并可能在设计创新的自旋设备时发现了重要的应用。
Spin Hall effect (SHE), a fundamental transport phenomenon with non-zero spin current but vanishing charge current, has important applications in spintronics for the electrical control of spins. Owing to the half-spin nature of electrons, the rank of spin current (determined by the rank of spin tensors) has been restricted to 0 and 1 for charge and spin Hall effects. Motivated by recent studies of pseudospin-1 fermions in solid state and cold atomic systems, here we introduce and characterize higher-rank ($\geq 2$) SHEs in large spin ($\geq 1$) systems. We find a universal rank-2 spin Hall conductivity $e/{8}π$, with zero rank-0 and 1 conductivities, for a spin-1 model with intrinsic spin-orbit coupling. Similar rank-2 SHEs can also be found in a spin-3/2 system. An experimental scheme is proposed to realize and measure rank-2 SHEs with pseudospin-1 ultracold fermionic atoms. Our results reveal novel spin transport phenomena in large spin systems and may find important applications in designing innovative spintronic devices.
