Radio-frequency oscillations in two-dimensional superconducting In-InOx: Apossible evidence for vortex density waves

Citation
Se. Hebboul et al., Radio-frequency oscillations in two-dimensional superconducting In-InOx: Apossible evidence for vortex density waves, PHYS REV L, 82(4), 1999, pp. 831-834
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
82
Issue
4
Year of publication
1999
Pages
831 - 834
Database
ISI
SICI code
0031-9007(19990125)82:4<831:ROITSI>2.0.ZU;2-E
Abstract
Large-amplitude radio-frequency oscillations were discovered in high sheet- resistance indium-indium-oxide films that carry nonuniform currents below t he zero-field superconducting transition. The sample geometry consists of a line that is oriented perpendicular to current flow inside a rectangular s ection of the film. As the de current increases above a threshold, the volt age spectrum displays several peaks which grow and shift toward higher freq uencies. The effect is attributed to wave excitations in the density of cur rent-depaired vortices and antivortices near the line tip.