Emergence of nanoscale inhomogeneity in the superconducting state of a homogeneously disordered conventional superconductor, NbN

Abstract

The notion of spontaneous formation of an inhomogeneous superconducting state is at the heart of most theories attempting to understand the superconducting state in the presence of strong disorder. Using scanning tunneling spectroscopy and high resolution scanning transmission electron microscopy, we experimentally demonstrate that under the competing effects of strong homogeneous disorder and superconducting correlations, the superconducting state of a conventional superconductor, NbN, spontaneously segregates into domains. Tracking these domains as a function of temperature we observe that the superconducting domains persist across the bulk superconducting transition, Tc, and disappear close to the pseudogap temperature, T*, where signatures of superconducting correlations disappear from the tunneling spectrum and the superfluid response of the system.

References in corpus (10)

• Localization of preformed Cooper-pairs in disordered superconductors
• Nature of the superconductor-insulator transition in disordered superconductors
• Disorder-Induced Inhomogeneities of the Superconducting State Close to the Superconductor-Insulator Transition
• Eigenfunction fractality and pseudogap state near superconductor-insulator transition
• Superconducting properties and Hall Effect of epitaxial NbN thin films
• Phase fluctuations in a strongly disordered s-wave superconductor close to the metal-insulator transition
• Frequency dependent superfluid stiffness in the pseudogap regime in strongly disordered NbN thin films
• Multiscale distribution of oxygen puddles in 1/8 doped YBa2Cu3O6.67
• Nanoscale Proximity Effect in the High Temperature Superconductor Bi-2212
• Phase diagram and upper critical field of homogenously disordered epitaxial 3-dimensional NbN films

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