论文标题
全面证明了外延PT薄膜中旋转式Hanle效应
Comprehensive Demonstration of Spin-Hall Hanle Effects in Epitaxial Pt Thin Films
论文作者
论文摘要
由于在Al2O3底物上生长的PT膜中的边界自旋积累，我们证明了非线性霍尔效应。该大厅的效果和先前证明的Hanle磁倍率提供了对自旋轨道耦合材料边界上的自旋和电荷传输的自旋细分控制的完整图片，我们称这是Spin-Hall Hanle效应（SHHE）。我们还表明，可以使用SHHE来测量重金属的自旋扩散长度，自旋 - 旋转角度和自旋松弛时间，而无需磁性界面或其他测量值的输入。在如此简单的系统中，SHE的全面演示表明它们可能无处不在，需要考虑在更复杂的旋转轨道耦合材料的薄膜结构中揭示旋转和电荷传输。
We demonstrate a nonlinear Hall effect due to the boundary spin accumulation in Pt films grown on Al2O3 substrates. This Hall effect and the previously demonstrated Hanle magnetoresistance provide a complete picture of the spin-precession control of the spin and charge transport at the boundary of a spin-orbit coupled material, which we refer to as spin-Hall Hanle effects (SHHE). We also show that the SHHE can be employed to measure the spin diffusion length, the spin-Hall angle, and the spin relaxation time of heavy metal without the need of magnetic interface or the input from other measurements. The comprehensive demonstration of SHHE in such a simple system suggests they may be ubiquitous and needs to be considered for unravelling the spin and charge transport in more complex thin film structures of spin-orbit coupled materials.
