Magnetic Field Enhanced Order Parameter Amplitude Fluctuations in Ultrathin Films near the Superconductor-Insulator Transition
Authors:
- 3 July 1995
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 75 (1) , 132-135
Abstract
A magnetic field tuned superconductor-insulator transition (SIT) in ultrathin PbBi/Ge films has been observed. Electron tunneling measurements in a magnetic field near the SIT show the presence of a large number of quasiparticle states near the Fermi energy. A simple analysis of these data shows that the average number of Cooper pairs in a coherence volume is on the order of 1 at the SIT. Combined with transport measurements, the data imply that strong fluctuations in the amplitude of the superconducting order parameter occur at this field tuned SIT.Keywords
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