发表机构
College of Physics, Nanjing University of Aeronautics and Astronautics（南京航空航天大学物理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文研究N/AM界面及N/AM/N异质结中的电子输运，揭示自旋双折射与全内反射现象，发现透射和极化随结长周期变化，交换场和自旋分裂强度显著影响自旋极化透射，为自旋电子器件奠定理论基础。
AI 中文摘要
本文研究了电子在N/AM界面或N/AM/N异质结中的输运性质。基于三个区域中的哈密顿量，提出了通用波函数并构建了组合线性方程。获得了交变磁体异质结构的反射系数、透射系数以及自旋极化率。当电子从普通金属入射到交变磁体时，它被散射并分裂为+分支和-分支，以不同的折射角透射到交变磁体区域。+分支可能发生全内反射。全反射的临界角由入射条件和AM材料的性质决定。在异质结情况下，自旋向上和自旋向下的电子以相同的传播方向但不同的透射概率透射。透射和极化随结的长度周期性变化。交换场和自旋分裂强度对自旋极化透射率有显著影响，而自旋轨道耦合的影响相当小。通过调节AM材料的参数可以找到优化系统。这项研究将为自旋选择性输出和自旋电子器件的实验研究奠定理论基础。
英文摘要
This paper investigates electron transport properties across N/AM interface or N/AM/N heterojunction. Based on Hamiltonians in the three regions, general wave functions are proposed and combined linear equations are constructed. Reflection and transmission coefficients as well as spin polarizatioin of the altermagnet heterostructure are obtained. When electron incident from normal metal to altermagnet, it is scattered and split into + branch and _ branch transmitting into altermagnet zone with separate refractive angles. Total internal reflection might happen to + branch. Critical angle of total reflection is determined by incident conditions and properties of AM material. In the heterostructure case, spin-up and spin-down electrons transmitted with same propagation directions but different transmission probabilities. Transmission and polarization periodically change with length of the junction. Exchange field and spin-splitting strength have pronounced effect on spin-polarized transmittance while the effect of spin-orbit coupling is quite small. Optimized system can be found by tuning parameters of the AM material. This study will lay the theoretical groundwork for experimental research on spin-selective outputs and spintronic devices.
Comments11 pages, 11 figures
