Magnetic-field dependence of the critical dynamics of a superconducting YBa2Cu3O7−δ detwinned single crystal
Jin-Tae Kim, Nigel Goldenfeld, J. Giapintzakis, D. M. Ginsberg
DOI 10.1103/PhysRevB.56.118 · Physical Review B
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Abstract
The in-plane longitudinal resistivities ρaa and ρbb of a single-crystal of YBa2Cu3O7−δ have been measured as a function of magnetic field H (less than 6.75 T) and temperature T near Tc. We found that the ρaa(T,H) data in the mixed state collapse into a single curve as a function of ρbb(T,H).The extracted fluctuation conductivity exhibits dynamic scaling over a wide range of T and H: assuming that the static universality class is the three-dimensional XY model yields the observed dynamic critical exponent z=1.5±0.1(H>0), apparently consistent with the dynamic universality class of superfluid 4He. In zero field, the data are inconclusive, and a reliable determination of z is not possible.
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. | 93.4 | Pressure not reported | zero_resistance |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 92.8 | Pressure not reported | onset |
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