论文标题
从核偏振梯度中驱动纯自旋电流
Driving a pure spin current from nuclear-polarization gradients
论文作者
论文摘要
当外部磁场和线性不均匀的旋转场被适当排列时，预计将发生纯自旋电流。在这些条件下（例如来自不影响轨道运动的核接触性超精美场），来自哈密顿兰道的线性，自旋依赖性分散体。结果是，相反方向的旋转沿相反方向产生纯自旋电流。自旋和电荷动力学的经典模型揭示了完整的量子机械解决方案的直观方面。我们提出了光学取向或电化实验，以证明这一结果。
A pure spin current is predicted to occur when an external magnetic field and a linearly inhomogeneous spin-only field are appropriately aligned. Under these conditions (such as originate from nuclear contact hyperfine fields that do not affect orbital motion) a linear, spin-dependent dispersion for free electrons emerges from the Landau Hamiltonian. The result is that spins of opposite orientation flow in opposite directions giving rise to a pure spin current. A classical model of the spin and charge dynamics reveals intuitive aspects of the full quantum mechanical solution. We propose optical orientation or electrical polarization experiments to demonstrate this outcome.
