ANOMALOUS BEHAVIOR OF THE CRITICAL-CURRENT OF A GRAIN-BOUNDARY JOSEPHSON-JUNCTION IN A BULK (BA,K)BIO3 BICRYSTAL

Authors
ROSHCHIN IV STEPANKIN VN YAKOVETS YP BARANOV MA KUZNETSOV AV ZHIGUNOV DI SHIRYAEV SV
Citation
Iv. Roshchin et al., ANOMALOUS BEHAVIOR OF THE CRITICAL-CURRENT OF A GRAIN-BOUNDARY JOSEPHSON-JUNCTION IN A BULK (BA,K)BIO3 BICRYSTAL, JETP letters, 59(3), 1994, pp. 168-172
Citations number
9
Categorie Soggetti
Physics
Journal title
JETP letters → ACNP
ISSN journal
00213640
Volume
59
Issue
3
Year of publication
1994
Pages
168 - 172
Database
ISI
SICI code
0021-3640(1994)59:3<168:ABOTCO>2.0.ZU;2-P
Abstract
The electrical transport properties of grain boundaries in bulk bicrys tals of the oxide superconductor Ba0.55K0.45BiO3 have been studied. Th e grain boundary in these bicrystals is a Josephson barrier. Near the transition temperature, the critical current of this barrier has a pow er-law temperature dependence with a critical exponent of 3/2. The cri tical current of a grain boundary exhibits a nonmonotonic behavior as the temperature is lowered. A possible interpretation of this behavior is discussed.