Frequency and temperature dependence of complex conductance of ultrathin YBa2Cu3O7-x films: a study of vortex-antivortex pair unbinding

Authors
Gasparov, VA Batov, IE Li, Q Kwon, C
Citation
Va. Gasparov et al., Frequency and temperature dependence of complex conductance of ultrathin YBa2Cu3O7-x films: a study of vortex-antivortex pair unbinding, PHYSICA B, 284, 2000, pp. 1021-1022
Citations number
8
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA B
ISSN journal
09214526 → ACNP
Volume
284
Year of publication
2000
Part
1
Pages
1021 - 1022
Database
ISI
SICI code
0921-4526(200007)284:<1021:FATDOC>2.0.ZU;2-6
Abstract
We have studied frequency and temperature dependences of complex sheet cond uctance of ultrathin (1-3 unit cell (UC) thick) YBa2Cu3O7-x films using a r adio frequency (1-20, 100-1000 MHz) sheet impedance and a microwave (30 GHz ) loss measurements. We found the activated temperature dependence of the v ortex diffusion constant and scaling behaviour of the universal ratio T-KTB (DC)/L-k(-1)(T-KTB) for 1UC, 2UC and 3UC YBCO films, in close agreement wit h theoretical prediction for vortex-antivortex unbinding transition. (C) 20 00 Elsevier Science B.V. All rights reserved.