Measurements of the magnetic-field-tuned conductivity of disordered two-dimensional Mo43Ge57 and InOx superconducting films: Evidence for a universal minimum superfluid response

S. Misra, L. Urban, M. Kim, G. Sambandamurthy, Ali Yazdani

Research output: Contribution to journalArticle

26 Scopus citations

Abstract

Our measurements of the low frequency ac conductivity in strongly disordered two-dimensional films near the magnetic-field-tuned superconductor-to-insulator transition show a sudden drop in the phase stiffness of superconducting order with either increased temperature or magnetic field. Surprisingly, for two different material systems, the abrupt drop in the superfluid density in a magnetic field has the same universal value as that expected for a Berezinskii-Kosterlitz-Thouless transition in a zero magnetic field. The characteristic temperature at which phase stiffness is suddenly lost can be tuned to zero at a critical magnetic field, following a power-law behavior with a critical exponent consistent with that obtained in previous dc transport studies on the dissipative side of the transition.

Original languageEnglish (US)
Article number037002
JournalPhysical Review Letters
Volume110
Issue number3
DOIs
StatePublished - Jan 14 2013

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Measurements of the magnetic-field-tuned conductivity of disordered two-dimensional Mo<sub>43</sub>Ge<sub>57</sub> and InO<sub>x</sub> superconducting films: Evidence for a universal minimum superfluid response'. Together they form a unique fingerprint.

  • Cite this