Metal-insulator transition in V2O3:: positron lifetime studies

被引：7
|
作者：
Sundar, CS [1 ]
Bharathi, A [1 ]
Premila, M [1 ]
Hariharan, Y [1 ]
机构：
[1] Indira Gandhi Ctr Atom Res, Div Mat Sci, Kalpakkam 603102, Tamil Nadu, India
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2001年 / 326卷 / 1-2期
关键词：
metal-insulator transition; V2O3; positron annihilation;
D O I：
10.1016/S0925-8388(01)01234-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Temperature dependence of positron lifetime has been studied across the metal-insulator transition at 150 K in V2O3. With the decrease of temperature, positron lifetime, 220 ps at room temperature is seen to decrease gradually to 190 ps at low temperature. The smaller value of lifetime in the low temperature insulating phase is surprising, and is possibly related to the changes in local structure across the rhombohedral to monoclinic structural transition. (C) 2001 Elsevier Science BY All rights reserved.
引用
收藏
页码：105 / 107
页数：3
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