SHAPIRO-LIKE STEPS FROM A WEAKLY COUPLED JUNCTION PREPARED WITH HIGH-TC SUPERCONDUCTING MATERIALS

Authors
KISHINO S KURODA H SHIBUTANI T NIU H
Citation
S. Kishino et al., SHAPIRO-LIKE STEPS FROM A WEAKLY COUPLED JUNCTION PREPARED WITH HIGH-TC SUPERCONDUCTING MATERIALS, Applied physics letters, 65(6), 1994, pp. 781-783
Citations number
12
Categorie Soggetti
Physics, Applied
Journal title
Applied physics letters → ACNP
ISSN journal
00036951
Volume
65
Issue
6
Year of publication
1994
Pages
781 - 783
Database
ISI
SICI code
0003-6951(1994)65:6<781:SSFAWC>2.0.ZU;2-B
Abstract
A trilayer junction composed of YBa2Cu3Oy/La0.7Ca0.3MnOz/YBa2Cu3Oy is prepared and the current-voltage (I-V) characteristics are examined wi th and without microwave illumination. The flow of the superconducting current is observed through the trilayer junction. At the same time, the trilayer junction is illuminated with microwaves. Resultant I-V cu rves show Shapiro-like steps, the spacing of which is different from t hat of the real Shapiro steps as well as the increase of electrical re sistance of the junction by the illumination. It is also observed that the Shapiro-like steps exhibit a kind of negative resistance on the c urrent-voltage curve.