Density of states in a superconductor carrying a supercurrent

Abstract

We have measured the tunneling density of states (DOS) in a superconductor carrying a supercurrent or exposed to an external magnetic field. The pair correlations are weakened by the supercurrent, leading to a modification of the DOS and to a reduction of the gap. As predicted by the theory of superconductivity in diffusive metals, we find that this effect is similar to that of an external magnetic field.

arXiv commentTo be published in Physical Review Letters

References in corpus (3)

• Quasiclassical Green's function approach to mesoscopic superconductivity
• The Josephson critical current in a long mesoscopic S-N-S junction
• Non-Linear and Non-Local Meissner Effect in Superconducting Wires

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