Observation of a blue shift in the optical response at the fundamental band gap in Ga1-xMnxAs

被引：13

作者：

de Boer, T. ^{[1
]}

Gamouras, A. ^{[1
]}

March, S. ^{[1
]}

Novak, V. ^{[2
]}

Hall, K. C. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 1Z9, Canada

[2] Inst Phys AS CR, Prague 16253, Czech Republic

来源：

PHYSICAL REVIEW B | 2012年 / 85卷 / 03期

基金：

加拿大自然科学与工程研究理事会; 加拿大创新基金会;

关键词：

TEMPERATURE-GROWN GAAS; MAGNETIZATION REVERSAL; CARRIER; NONLINEARITIES; SEMICONDUCTORS; (GA;

D O I：

10.1103/PhysRevB.85.033202

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report the observation of a sharp band-edge response in spectrally resolved differential reflectivity experiments on GaMnAs, in contrast to linear optical experiments in which large band-tail effects are known to dominate. The differential reflectivity response exhibits a blue shift relative to results in GaAs and LT-GaAs, consistent with the valence-band model of ferromagnetism. Our results demonstrate the utility of nonlinear optical techniques for studying the electronic structure of III-Mn-V diluted magnetic semiconductors.

引用

收藏

页数：5

相关论文

共 54 条

[1] Theory of magnetic anisotropy in III1-xMnxV ferromagnets -: art. no. 054418 [J].

Abolfath, M ;

Jungwirth, T ;

Brum, J ;

MacDonald, AH .

PHYSICAL REVIEW B, 2001, 63 (05)

[2] Electronic Structure of Ferromagnetic Semiconductor Ga1-xMnxAs Probed by Subgap Magneto-optical Spectroscopy [J].

Acbas, G. ;

Kim, M. -H. ;

Cukr, M. ;

Novak, V. ;

Scarpulla, M. A. ;

Dubon, O. D. ;

Jungwirth, T. ;

Sinova, Jairo ;

Cerne, J. .

PHYSICAL REVIEW LETTERS, 2009, 103 (13)

[3] DIRECT OBSERVATION OF ELECTRON RELAXATION IN INTRINSIC GAAS USING FEMTOSECOND PUMP-PROBE SPECTROSCOPY [J].

ALEXANDROU, A ;

BERGER, V ;

HULIN, D .

PHYSICAL REVIEW B, 1995, 52 (07) :4654-4657

[4] Origin of the anomalous magnetic circular dichroism spectral shape in ferromagnetic Ga1-xMnxAs:: Impurity bands inside the band gap [J].

Ando, K. ;

Saito, H. ;

Agarwal, K. C. ;

Debnath, M. C. ;

Zayets, V. .

PHYSICAL REVIEW LETTERS, 2008, 100 (06)

[5]

Awschalom DD, 2002, NANOSCI TECHNOL, P147

[6] Magnetic circular dichroism studies of carrier-induced ferromagnetism in (Ga1-xMnx)As [J].

Beschoten, B ;

Crowell, PA ;

Malajovich, I ;

Awschalom, DD ;

Matsukura, F ;

Shen, A ;

Ohno, H .

PHYSICAL REVIEW LETTERS, 1999, 83 (15) :3073-3076

[7] Impurity band conduction in a high temperature ferromagnetic semiconductor [J].

Burch, K. S. ;

Shrekenhamer, D. B. ;

Singley, E. J. ;

Stephens, J. ;

Sheu, B. L. ;

Kawakami, R. K. ;

Schiffer, P. ;

Samarth, N. ;

Awschalom, D. D. ;

Basov, D. N. .

PHYSICAL REVIEW LETTERS, 2006, 97 (08)

[8] Ellipsometric study of the electronic structure of Ga1-xMnxAs and low-temperature GaAs -: art. no. 205208 [J].

Burch, KS ;

Stephens, J ;

Kawakami, RK ;

Awschalom, DD ;

Basov, DN .

PHYSICAL REVIEW B, 2004, 70 (20) :205208-1

[9] ANOMALOUS OPTICAL ABSORPTION LIMIT IN INSB [J].

BURSTEIN, E .

PHYSICAL REVIEW, 1954, 93 (03) :632-633

[10] Electrical manipulation of magnetization reversal in a ferromagnetic semiconductor [J].

Chiba, D ;

Yamanouchi, M ;

Matsukura, F ;

Ohno, H .

SCIENCE, 2003, 301 (5635) :943-945

← 1 2 3 4 5 6 →