2003/12/26 by Felix Soto, F. Soto, C. Carballeira +18
Economics, Econometrics and Finance · Physics and Astronomy · #Complex Systems and Time Series Analysis #Physics of Superconductivity and Magnetism #Theoretical and Computational Physics #cond-mat.supr-con
paper · pdf · doi:10.48550/arxiv.cond-mat/0312647
LaTeX, 13 pages including 4 figures
arxiv created 2003/12/26 · arxiv updated 2009/12/01
The effects induced on the magnetization by coherent fluctuating Cooper pairs in the normal state have been measured in Pb1-xInx alloys up to high magnetic fields, of amplitudes above Hc2(0), the upper critical field extrapolated to T=0K. Our results show that in dirty alloys these superconducting fluctuation effects are, in the entire H-T phase diagram above Hc2(T), independent of the amount of impurities and that they vanish when H~1.1Hc2(0). These striking results are consistent with a phenomenological estimate that takes into account the limits imposed by the uncertainty principle to the shrinkage, when H increases, of the superconducting wave function.