Experimental evidence for negative correlation energy and valence alternation in amorphous selenium

被引：32

作者：

Kolobov, AV ^{[1
]}

Kondo, M ^{[1
]}

Oyanagi, H ^{[1
]}

Durny, R ^{[1
]}

Matsuda, A ^{[1
]}

Tanaka, K ^{[1
]}

机构：

[1] ELECTROTECH LAB,TSUKUBA,IBARAKI 305,JAPAN

来源：

PHYSICAL REVIEW B | 1997年 / 56卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.56.R485

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two different kinds of electron spin resonance signals, triclinic and isotropic, are observed in amorphous selenium under photoexcitation at 20 K, their concentration being around 10(20) cm(-3). At higher temperatures, isotropic centers are converted into triclinic ones. These centers are identified as singly and triply coordinated Se defects. The results present experimental evidence for negative-U centers and valence alternation in amorphous selenium.

引用

页码：R485 / R488

页数：4

共 18 条

[1] ON QUESTION OF CHAIN-END ESR IN AMORPHOUS SELENIUM [J].