Thickness dependence of the superconductivity in thin disordered NbSi films

O. Crauste (1) , C.A. Marrache-Kikuchi (1) , L. Berge (1) , D. Stanescu (1) , L. Dumoulin (1)

1 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse

Superconducting a-NbxSi1-x thin films experience a lowering of the T-c until the superconductivity disappears through a Superconductor-Insulator Transition (SIT). We here present transport measurements on 2D a-NbxSi1-x films, close to the SIT, for different compositions and thicknesses. We investigate the lowering of the T-c in light of existing theories, especially the one developed by Finkel'stein.

Mots clés: QUANTUM PHASE-TRANSITIONS; 2-DIMENSIONAL SUPERCONDUCTORS; SUPPRESSION

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Supraconductivité [cond-mat.supr-con]

O. Crauste, C.A. Marrache-Kikuchi, L. Berge, D. Stanescu, L. Dumoulin. Thickness dependence of the superconductivity in thin disordered NbSi films. 25TH INTERNATIONAL CONFERENCE ON LOW TEMPERATURE PHYSICS (LT25), PART 4 - QUANTUM PHASE TRANSITIONS AND MAGNETISM, Aug 2008, Amsterdam, Netherlands. pp.042019, ⟨10.1088/1742-6596/150/4/042019⟩. ⟨in2p3-00596985⟩