We investigate current-voltage measurements of a superconductor in a magnetic field for a continuous superconducting transition. Existence of such a transition in the mixed state has been the subject of recent controversy due to flexibility in the conventional scaling analysis. To address this, we analyze current-voltage data using scaling forms based on the crossover current. One of these scaling forms, based on the logarithmic derivative of current-voltage isotherms, is a stringent test for a superconducting transition. Applying this derivative scaling test to the data shows marked disagreement with a superconducting transition, which indicates that one does not occur within the mixed state.
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 2006|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics