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Superconductor-Insulator Transitions in Pure Polycrystalline Nb Thin Films

F. Couëdo 1 O. Crauste 1 L. Berge 2 Y. Dolgorouky 1 C. Marrache 1 L. Dumoulin 1
1 CSNSM PS1
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière
2 CSNSM INSTR
CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
Abstract : We report on a study of the transport properties of Nb thin films. By varying the thickness of the films from 263 angstrom to 25 angstrom, we observed a depression of the superconductivity. Magnetic field was also applied up to 6 T, inducing the disappearance of the superconductivity and the onset of an insulating behavior. The results were compared to those we have already obtained on a highly disordered system, a-NbxSi1-x, to understand whether the same mechanisms for the disappearance of the superconductivity could be at play in pure metallic thin films and in highly disordered systems.
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Conference papers
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http://hal.in2p3.fr/in2p3-00824879
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Submitted on : Wednesday, May 22, 2013 - 3:27:00 PM
Last modification on : Wednesday, September 16, 2020 - 5:43:38 PM

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F. Couëdo, O. Crauste, L. Berge, Y. Dolgorouky, C. Marrache, et al.. Superconductor-Insulator Transitions in Pure Polycrystalline Nb Thin Films. 26th International conference on low temperature physics (LT26), 2011, Beijin, China. pp.022011, ⟨10.1088/1742-6596/400/2/022011⟩. ⟨in2p3-00824879⟩

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