Metal-insulator transition in V2O3: positron lifetime studies

Authors
Sundar, CS Bharathi, A Premila, M Hariharan, Y
Citation
Cs. Sundar et al., Metal-insulator transition in V2O3: positron lifetime studies, J ALLOY COM, 326(1-2), 2001, pp. 105-107
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF ALLOYS AND COMPOUNDS
ISSN journal
09258388 → ACNP
Volume
326
Issue
1-2
Year of publication
2001
Pages
105 - 107
Database
ISI
SICI code
0925-8388(20010809)326:1-2<105:MTIVPL>2.0.ZU;2-F
Abstract
Temperature dependence of positron lifetime has been studied across the met al-insulator transition at 150 K in V2O3. With the decrease of temperature, positron lifetime, 220 ps at room temperature is seen to decrease graduall y to 190 ps at low temperature. The smaller value of lifetime in the low te mperature insulating phase is surprising, and is possibly related to the ch anges in local structure across the rhombohedral to monoclinic structural t ransition. (C) 2001 Elsevier Science BY All rights reserved.