Direct Transition from Bose Glass to Normal State in the (K,Ba)BiO3 Superconductor
T. Klein, C. Marcenat, S. Blanchard, J. Marcus, C. Bourbonnais, R. Brusetti, C. J. van der Beek, M. Konczykowski
DOI 10.1103/PhysRevLett.92.037005 · Physical Review Letters
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Abstract
The introduction of columnar defects in (K,Ba)BiO3 single crystals shifts both the irreversibility and thermodynamic transition lines, respectively, deduced from ac susceptibility (and/or transport) and specific heat measurements, upwards. This shift can be attributed to the defect-induced decrease of the difference (ΔF) between the free energies in the superconducting and the normal states, assuming that the position of the superconducting transition is given by the condition |ΔF|≈kBT/ξ3. This criterion also perfectly reproduces the influence of the angle between the tracks and the external field. This result suggests that no vortex liquid phase exists in this system.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| (K,Ba)BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.5 | Pressure not reported | onset |
| (K,Ba)BiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 31.5 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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