Kosterlitz-Thouless transition of fluxless solitons in superconducting YBa2Cu3O7−δ single crystals
P. C. E. Stamp, L. Forro, C. Ayache
DOI 10.1103/PhysRevB.38.2847 · Physical Review B
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Abstract
We present detailed evidence for a resistive Kosterlitz-Thouless transition in YBa2Cu3O7−δ single crystals. The Kosterlitz-Thouless temperature TKT is the onset temperature for zero-resistance superconductivity in the ab planes; three-dimensional superconductivity throughout the sample follows at a lower temperature. The objects which engage in the transition do not carry flux—they are not the flux vortices of conventional theory. They are more likely normal-state excitations that pair up at TKT to form quasi-two-dimensional superconducting condensates.
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. | 80 | Pressure not reported | zero_resistance |
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