en fr Study of accessible ground states in two-dimensional disordered superconductors Etude des états fondamentaux dans des systèmes supraconducteurs désordonnés de dimension 2 Report as inadecuate




en fr Study of accessible ground states in two-dimensional disordered superconductors Etude des états fondamentaux dans des systèmes supraconducteurs désordonnés de dimension 2 - Download this document for free, or read online. Document in PDF available to download.

1 CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière

Abstract : An initially superconducting 3D material can have different ground states, depending on its disorder : superconducting, metallic or insulating. At lower dimensionality, Anderson localization theoretically forbids any metallic state. A change in disorder then induces a direct Superconductor-to-Insulator Transition SIT. The presence of strong Coulomb interactions, which are not taken into account in conventional theories, may disrupt this paradigm and enable the emergence of 2D metallic phases, thus complicating the generally admitted picture for the SIT. Indeed, recent work has revealed the existence of two distinct metallic phases in a-NbxSi1-x thin films, in between the superconducting and insulating states.During this work, we have studied the low frequency transport properties of amorphous NbxSi1-x films at low temperatures T



Author: Vincent Humbert -

Source: https://hal.archives-ouvertes.fr/



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