Critical fields and flux-flow resistances in strongly disordered ultra-thin superconducting films

Gupta, Das K
Soman, Swati S
Chandrasekhar, N

Publication date

January 2003

Publisher

Elsevier

Abstract

Strongly disordered ultra-thin films of Bi and $Sn(<100\AA)$ produced by quench-condensation, are well known systems that show insulator to superconductor transition. Some aspects of the transition and the nature of the superconducting state are weakly dependent on the material and substrate, but we find that the critical field $(B_c_2)$ of Bi and Sn films of comparable resistance show different temperature dependences. For Sn the mean field $B_c_2$ is seen to vary with temperature as $ B_c_2(T)=B_c_2(0)(1-(T/T_c))^2 $ whereas for Bi it is found to be $ B_c_2(T)=B_c_2(0)(1-(T/T_c))^\alpha $ with $\alpha \approx 1.14.$ In films with low sheet resistance we find a dissipationless vortex-solid regime. The flux-flow resistance calculated from t...

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Critical fields and flux-flow resistances in strongly disordered ultra-thin superconducting films

Abstract

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Critical fields and flux-flow resistances in strongly disordered ultra-thin superconducting films

Abstract

Extracted data

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