Anisotropic optical properties of Fe/GaAs(001) nanolayers from first principles

Article

关键词: EPITAXIAL FE FILMS;    BRILLOUIN-ZONE INTEGRATIONS;    MAGNETIC ANISOTROPIES;    ULTRATHIN FILMS;    SPIN INJECTION;    SEMICONDUCTOR;    SPINTRONICS;    INTERFACE;    GAAS(001);    AU;   

DOI  :  10.1103/PhysRevB.90.045315

来源: SCIE

【 摘 要 】

We investigate the anisotropy of the optical properties of thin Fe films on GaAs(001) from first-principles calculations. Both intrinsic and magnetization-induced anisotropy are covered by studying the system in the presence of spin-orbit coupling and external magnetic fields. We use the linearized augmented plane wave method, as implemented in the WIEN2K density functional theory code, to show that the C-2v symmetric anisotropy of the spin-orbit coupling fields at the Fe/GaAs(001) interface manifests itself in the corresponding anisotropy of the optical conductivity and the polar magneto-optical Kerr effect. While their magnetization-induced anisotropy is negligible, the intrinsic anisotropy of the optical properties is significant and reflects the underlying C-2v symmetry of the Fe/GaAs(001) interface. This suggests that the effects of anisotropic spin-orbit coupling fields in experimentally relevant Fe/GaAs(001) slabs can be studied by purely optical means.

【 授权许可】

Free