Longitudinal Proximity Effects in Superconducting Transition-Edge Sensors

Autor:	Sadleir, John E., Smith, Stephen J., Bandler, Simon R., Chervenak, James A., Clem, John R.
Rok vydání:	2009
Předmět:	Condensed Matter - Superconductivity Astrophysics - Instrumentation and Methods for Astrophysics
Zdroj:	Phys.Rev.Lett.104:047003,2010
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.104.047003
Popis:	We have found experimentally that the critical current of a square superconducting transition-edge sensor (TES) depends exponentially upon the side length L and the square root of the temperature T. As a consequence, the effective transition temperature Tc of the TES is current-dependent and at fixed current scales as 1/L^2. We also have found that the critical current can show clear Fraunhofer-like oscillations in an applied magnetic field, similar to those found in Josephson junctions. The observed behavior has a natural theoretical explanation in terms of longitudinal proximity effects if the TES is regarded as a weak link between superconducting leads. We have observed the proximity effect in these devices over extraordinarily long lengths exceeding 100 um. Comment: 4 pages, 2 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/0910.2451 Zobrazit plný text záznamu View this record from Arxiv