RESISTIVE UPPER CRITICAL-FIELD OF TL2BA2CUO6 AT LOW-TEMPERATURE AND HIGH MAGNETIC-FIELDS

Authors
MACKENZIE AP JULIAN SR LONZARICH GG CARRINGTON A HUGHES SD LIU RS SINCLAIR DC
Citation
Ap. Mackenzie et al., RESISTIVE UPPER CRITICAL-FIELD OF TL2BA2CUO6 AT LOW-TEMPERATURE AND HIGH MAGNETIC-FIELDS, Physical review letters, 71(8), 1993, pp. 1238-1241
Citations number
33
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
71
Issue
8
Year of publication
1993
Pages
1238 - 1241
Database
ISI
SICI code
0031-9007(1993)71:8<1238:RUCOTA>2.0.ZU;2-Z
Abstract
The resistive upper critical field of overdoped single crystals of Tl2 Ba2CuO6 has been measured from the zero field transition temperature T (c)(0) (approximately 20 K) to temperatures as low as 12 mK, correspon ding to less than 0.001T(c)(0). In sharp contrast to the predictions o f standard theories of superconductivity, the critical field is found to rise steeply with positive curvature as the temperature is reduced, and no sign of saturation is observed down to the lowest temperatures reached.