LOW-TEMPERATURE STATIC MAGNETIC-SUSCEPTIBILITY OF AL0.3GA0.7AS WITH DX CENTERS

被引：13

作者：

KATSUMOTO, S

MATSUNAGA, N

YOSHIDA, Y

SUGIYAMA, K

KOBAYASHI, S

机构：

[1] Department of Physics, University of Tokyo, tokyo, 113

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS PART 2-LETTERS & EXPRESS LETTERS | 1990年 / 29卷 / 09期

关键词：

Aigaas; Deep levels; Magnetic susceptibility; Negative-U; Persistent photoconductivity;

D O I：

10.1143/JJAP.29.L1572

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have measured the static magnetic susceptibility of Al0.3Ga0.7As doped with 1×1018 cm-3 Te from 20 mK to 1 K in order to study the electron ground state of the DX center. We observed Curie-law temperature dependence of the susceptibility which should come from some paramagnetic centers. The concentration of the paramagnetic center assuming g=2 and spin 1/2 is much lower than that of the DX center. The result indicates that the ground state of the DX center has no spin, thus supporting the negative–U picture of the ground state of the DX center. © 1990 The Japan Society of Applied Physics.

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页码：L1572 / L1574

页数：3

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