Unified order-disorder vortex phase transition in high-Tc superconductors
Y. Radzyner, A. Shaulov, Y. Yeshurun
DOI 10.1103/PhysRevB.65.100513 · Physical Review B
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Abstract
The diversity of vortex melting and solid-solid transition lines measured in different high-Tc superconductors is explained, postulating a unified order-disorder phase transition driven by both thermally- and disorder-induced fluctuations. The temperature dependence of the transition line and the nature of the disordered phase (solid, liquid, or pinned liquid) are determined by the relative contributions of these fluctuations and by the pinning mechanism. By varying the pinning mechanism and the pinning strength one obtains a spectrum of monotonic and nonmonotonic transition lines similar to those measured in Bi2Sr2CaCu2O8, YBa2Cu3O7−δ, Nd1.85Ce0.15CuO4−δ, Bi1.6Pb0.4Sr2CaCu2O8+δ, and (La0.937Sr0.063)2CuO4.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 93 | Pressure not reported | unknown |
| Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 26 | Pressure not reported | unknown |
| (La0.937Sr0.063)2CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 32 | Pressure not reported | unknown |
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