Intrinsic transmission magnetic circular dichroism spectra of GaMnAs

被引：2

作者：

Terada, Hiroshi ^{[1
]}

Ohya, Shinobu ^{[1
,2
,3
]}

Tanaka, Masaaki ^{[1
,2
]}

机构：

[1] Univ Tokyo, Grad Sch Engn, Dept Elect Engn & Informat Syst, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[2] Univ Tokyo, Grad Sch Engn, Ctr Spintron Res Network, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

[3] Univ Tokyo, Inst Engn Innovat, Grad Sch Engn, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1138656, Japan

来源：

AIP ADVANCES | 2018年 / 8卷 / 03期

关键词：

TEMPERATURE; BAND;

D O I：

10.1063/1.5020725

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Transmission magnetic circular dichroism (MCD) spectroscopy has been widely used to reveal the spin-dependent band structure of ferromagnetic semiconductors. In these previous studies, some band pictures have been proposed from the spectral shapes observed in transmission MCD; however, extrinsic signals originating from optical interference have not been appropriately considered. In this study, we calculate the MCD spectra taking into account the optical interference of the layered structure of samples and show that the spectral shape of MCD is strongly influenced by optical interference. To correctly understand the transmission MCD, we also calculate the intrinsic MCD spectra of GaMnAs that are not influenced by the optical interference. The spectral shape of the intrinsic MCD can be explained by the characteristic band structure of GaMnAs, that is, the spin-polarized valence band and the impurity band existing above the valence band top. (c) 2018 Author(s).

引用

页数：7

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