Infrared probe of itinerant ferromagnetism in Ga1-xMnxAs -: art. no. 097203

被引：97

作者：

Singley, EJ ^{[1
]}

Kawakami, R

Awschalom, DD

Basov, DN

机构：

[1] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[2] Univ Calif Santa Barbara, Dept Phys, Santa Barbara, CA 93106 USA

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 89卷 / 09期

关键词：

D O I：

10.1103/PhysRevLett.89.097203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The doping and temperature dependence of the complex conductivity is determined for the ferromagnetic semiconductor Ga1-xMnxAs. A broad resonance develops with Mn doping at an energy scale of similar to200 meV, well within the GaAs band gap. Possible origins of this feature are explored in the context of a Mn induced impurity band and intervalence band transitions. From a sum rule analysis of the conductivity data the effective mass of the itinerant charge carriers is found to be at least a factor of 3 greater than what is expected for hole doped GaAs. In the ferromagnetic state a significant decrease in the effective mass is observed, demonstrating the role played by the heavy carriers in inducing ferromagnetism in this system.

引用

页码：972031 / 972034

页数：4

共 32 条

[1] Ferromagnetism and its stability in the diluted magnetic semiconductor (In,Mn)As [J].

Akai, H .

PHYSICAL REVIEW LETTERS, 1998, 81 (14) :3002-3005

[2] Effective interaction Hamiltonian of polaron pairs in diluted magnetic semiconductors [J].

Angelescu, DE ;

Bhatt, RN .

PHYSICAL REVIEW B, 2002, 65 (07) :1-8

[3]

ASKLUND H, CONDMAT0112287

[4] 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

[5] Scaling between magnetization and Drude weight in EuB6 -: art. no. 121102 [J].

Broderick, S ;

Ruzicka, B ;

Degiorgi, L ;

Ott, HR ;

Sarrao, JL ;

Fisk, Z .

PHYSICAL REVIEW B, 2002, 65 (12) :1211021-1211024

[6] PHOTOEXCITATION AND PHOTOIONIZATION OF NEUTRAL MANGANESE ACCEPTORS IN GALLIUM ARSENIDE [J].

CHAPMAN, RA ;

HUTCHINSON, WG .

PHYSICAL REVIEW LETTERS, 1967, 18 (12) :443-+

[7] Zener model description of ferromagnetism in zinc-blende magnetic semiconductors [J].

Dietl, T ;

Ohno, H ;

Matsukura, F ;

Cibert, J ;

Ferrand, D .

SCIENCE, 2000, 287 (5455) :1019-1022

[8] TRANSPORT-PROPERTIES OF THE KONDO-LATTICE MODEL IN THE LIMIT S=INFINITY AND D=INFINITY [J].

FURUKAWA, N .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1994, 63 (09) :3214-3217

[9] Ferromagnetism from undressing [J].

Hirsch, JE .

PHYSICAL REVIEW B, 2000, 62 (21) :14131-14139

[10]

HWANG EH, CONDMAT0202071

← 1 2 3 4 →