Rahimi F, Phirouznia A
Department of Physics, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran.
Condensed Matter Computational Research Lab, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran.
Sci Rep. 2023 Aug 8;13(1):12874. doi: 10.1038/s41598-023-39593-6.
Non-equilibrium spin-polarized transport properties of antiferromagnetic stanene nanoribbons are theoretically studied under the combining effect of a normal electric field and linearly polarized irradiation based on the tight-binding model at room temperature. Due to the existence of spin-orbit coupling in stanene lattice, applying normal electric field leads to splitting of band degeneracy of spin-resolved energy levels in conduction and valence bands. Furthermore, unequivalent absorption of the polarized photons at two valleys which is attributed to an antiferromagnetic exchange field results in unequal spin-polarized photocurrent for spin-up and spin-down components. Interestingly, in the presence of band bending which has been induced by edge potentials, an allowable quantum efficiency occurs over a wider wavelength region of the incident light. It is especially important that the variation of an exchange magnetic field generates spin semi-conducting behavior in the bended band structure. Moreover, it is shown that optical spin-filtering effect is obtained under the simultaneous effect of uniaxial strain and narrow edge potential.
基于紧束缚模型，在室温下，研究了在正常电场和线偏振光辐照的联合作用下，反铁磁锡烯纳米带的非平衡自旋极化输运特性。由于锡烯晶格中存在自旋轨道耦合，施加正常电场会导致导带和价带中自旋分辨能级的能带简并分裂。此外，由于反铁磁交换场导致的两个谷对偏振光子的不等效吸收，使得自旋向上和自旋向下分量的自旋极化光电流不相等。有趣的是，在由边缘势引起的能带弯曲存在的情况下，在更宽的入射光波长区域会出现允许的量子效率。特别重要的是，交换磁场的变化会在弯曲的能带结构中产生自旋半导体行为。此外，结果表明，在单轴应变和窄边缘势的同时作用下可获得光学自旋滤波效应。
