Abstract
DC voltage versus current measurements of superconductors in a magnetic field are widely interpreted to imply that a phase transition occurs into a state of zero resistance. We show that the widely-used scaling function approach has a problem: Good data collapse occurs for a wide range of critical exponents and temperatures. This strongly suggests that agreement with scaling alone does not prove the existence of the phase transition. We discuss a criterion to determine if the scaling analysis is valid, and find that all of the data in the literature that we have analyzed fail to meet this criterion. Our data on YBCO films, and other data that we have analyzed, are more consistent with the occurrence of small but non-zero resistance at low temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 65-77 |
| Number of pages | 13 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4811 |
| DOIs | |
| State | Published - 2002 |
| Event | Superconducting and Related Oxides: Physics and Nanoengineering V - Seattle, WA, United States Duration: Jul 8 2002 → Jul 11 2002 |
Keywords
- Bose glass
- Critical exponents
- Phase transitions
- Scaling
- Superconductivity
- Vortex glass
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering