On dynamic regime of phase-slip lines in wide superconducting films

✍ Scribed by Andrey V. Kulikovsky; Khassanby Kh. Erganokov

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 136 KB
• Volume: 21
• Category: Article
• ISSN: 0749-6036
• DOI: 10.1006/spmi.1996.0398

✦ Synopsis

Resistive current states in wide superconducting tin films with a dynamic phase slippage have been investigated experimentally. We studied simultaneously the processes of the phase-slip lines' evolution and the heat exchange between the sample and a surrounding medium. Steps on the voltage dependence of the thermal flow from the sample were observed. They demonstrate an instantaneous decrease of the thermal flow from the sample at voltages when a destruction of the stable phase-slip state occurs due to the thermal instability. This phenomenon was analyzed in view of the theory predicting the pulsed phonon fluxes from the active phase-slip regions. We explained the discovered peculiarities by a fast disappearance of the phase-slip lines' structure that operated as a source of phonons. The expression for the thermal energy drop was derived for our case. A comparison of the experimental and calculated dependencies demonstrated a qualitative coincidence.