Do Superconductors Have Zero Resistance in a Magnetic Field?
D. R. Strachan, M. C. Sullivan, P. Fournier, S. P. Pai, T. Venkatesan, C. J. Lobb
DOI 10.1103/PhysRevLett.87.067007 · Physical Review Letters
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We show that dc voltage versus current measurements of a YBa2Cu3O7−δ film in a magnetic field can be collapsed onto scaling functions proposed by Fisher et al. [Phys. Rev. B 43, 130 (1991)] as is widely reported in the literature. We find, however, that good data collapse is achieved for a wide range of critical exponents and temperatures. These results strongly suggest that agreement with scaling alone does not prove the existence of a phase transition. We propose a criterion to determine if the data collapse is valid, and thus if a phase transition occurs. To our knowledge, none of the data reported in the literature meet our criterion.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.5 | Pressure unresolved | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91.5 | Pressure unresolved | zero_resistance |
Similar papers
Resistive Transition of High-Temperature Superconductors
similarity 0.95M. Tinkham
Source status unknown — claims are unverified
Effects of self field and low magnetic fields on the normal-superconducting phase transition
similarity 0.95M. C. Sullivan et al.
Source status unknown — claims are unverified
Zero-field superconducting phase transition obscured by finite-size effects in thick YBa2Cu3O7−δ films
similarity 0.95M. C. Sullivan et al.
Source status unknown — claims are unverified
Total Suppression of Superconductivity by High Magnetic Fields in YBa2Cu3O6.6
similarity 0.94F. Rullier-Albenque et al.
Source status unknown — claims are unverified
Anomalous ac magnetic susceptibility of high-temperature YBa2Cu3O7−δ superconductors
similarity 0.94D.-X. Chen et al.
Source status unknown — claims are unverified
Giant Magnetoresistance in Ferromagnet/Superconductor Superlattices
similarity 0.94V. Peña et al.
Source status unknown — claims are unverified