We study the effects of asymmetrical magnetization and an optoelectronic tunable band structure on the transmission of particles in a MoS2 tunnel junction. Based on the results, we propose a model for a multifunctional coupler as a single system incorporating giant magnetoresistance, a spin–valley filter, and a spin–valley valve. The device is made up of ferromagnetic/ferromagnetic/normal junctions, with an off-resonant light and an electric gate potential functioning as the spin–valley filter and spin–valley valve, respectively. Increasing the asymmetrical magnetization is found to substantially enhance the tunneling magnetoresistance (TMR) of the system, leading to giant TMR. The spin–valley filtering is based on the spin imbalance modulation that arises from asymmetrical magnetization and the valley degeneracy breaking of off-resonant light, and the spin–valley valve is produced by altering the effective density of states of spin/valley polarized bands via the gate potential that controls the flow of spin/valley polarized particles. By fixing the magnetization configurations, one specific spin–valley filter and spin–valley valve can be acquired by tuning an external parameter to the corresponding spin/valley polarized energy windows.

中文翻译：

---

非对称 MoS2 隧道结中的受控巨磁电阻和自旋谷输运

我们研究了不对称磁化和光电可调能带结构对 MoS2 隧道结中粒子传输的影响。基于这些结果，我们提出了一个多功能耦合器模型，它是一个包含巨磁阻、自旋谷滤波器和自旋谷阀的单一系统。该器件由铁磁/铁磁/法向结组成，具有偏共振光和栅极电位，分别用作自旋谷滤波器和自旋谷阀。发现增加不对称磁化强度可以显着增强系统的隧道磁阻 (TMR)，从而产生巨大的 TMR。自旋谷滤波基于由不对称磁化和离谐振光的谷简并破坏引起的自旋不平衡调制，自旋谷阀是通过控制自旋/谷极化粒子流动的栅极电位改变自旋/谷极化带态的有效密度产生的。通过固定磁化配置，可以通过将外部参数调整到相应的自旋/谷极化能量窗口来获得一个特定的自旋谷滤波器和自旋谷阀。