Peculiarities of the exchange interaction in narrow-gap Hg1-x-yCdxMnySe

被引：3
|
作者：
Hoerstel, W
Kraak, W
Masselink, WT
Mazur, YI
Tarasov, GG
Belyaev, AE
Kuzmenko, EV
机构：
[1] Humboldt Univ, Dept Phys, D-10115 Berlin, Germany
[2] Natl Acad Sci Ukraine, Inst Semicond Phys, UA-252650 Kiev, Ukraine
来源：
SEMICONDUCTOR SCIENCE AND TECHNOLOGY | 1999年 / 14卷 / 09期
关键词：
D O I：
10.1088/0268-1242/14/9/313
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The peculiarities of the exchange interaction between the carrier spin and localized spin moments of magnetic ions near the semimetal-semiconductor transition have been studied in a semimagnetic quaternary solid solution system, Hg1-x-yCdxMnySe (x = 0.10, y = 0.02, E-g = 45 meV), by means of Shubnikov-de Haas oscillations. The measurements show that the exchange 'constant' alpha is actually a somewhat complicated function <(alpha)over tilde> of energy gap E-g and electron concentration, which changes from negative values (<(alpha)over tilde>N-0 = -0.15 eV) at lower electron concentration to positive values (<(alpha)over tilde>N-0 = 0.28 eV) at higher electron concentration, values which are more typically associated with wide-gap semimagnetic semiconductors.
引用
收藏
页码：820 / 828
页数：9
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