Double-exchange-like interaction in Ga1-xMnxAs investigated by infrared absorption spectroscopy -: art. no. 193312

被引：58

作者：

Hirakawa, K

Katsumoto, S

Hayashi, T

Hashimoto, Y

Iye, Y

机构：

[1] Univ Tokyo, Inst Ind Sci, Meguro Ku, Tokyo 1538505, Japan

[2] Univ Tokyo, Inst Solid State Phys, Chiba 2778581, Japan

来源：

PHYSICAL REVIEW B | 2002年 / 65卷 / 19期

关键词：

D O I：

10.1103/PhysRevB.65.193312

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated the infrared optical absorption alpha(omega) of ferromagnetic p-type Ga1-xMnxAs. The observed alpha(omega) showed very non-Drude characteristics, indicating that the holes are nearly localized by disorder. Furthermore, a temperature-dependent spectral transfer between interband and intraband transitions is observed, which strongly suggests that the double-exchange-like mechanism is playing an important role in the ferromagnetic ordering process in III-V diluted magnetic semiconductors. The origin of resistance kinks near T-c (often attributed to "critical scattering") is also discussed.

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页码：1 / 4

页数：4

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