Evolution of self-organized bulk vortex structure induced by hole doping in the high-temperature superconductor YBa2Cu3O7−δ
A. I. Mansour, Rongchao Ma, M. Egilmez, M. M. Saber, I. Fan, K. H. Chow, J. Jung
DOI 10.1103/PhysRevB.79.172504 · Physical Review B
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Abstract
Studies of the persistent current relaxation of YBa2Cu3O7−δ ring-shaped thin films as a function of oxygen concentration (with 24 increments in δ every ∼0.021, over a range between 0.03 and 0.55) allowed us to construct the (μ,δ) phase diagram where the exponent μ characterizes the pinning ability and the nature of the vortex structure. The reduction of the hole-doping level (an increase in δ) transforms the vortex structure from quasi-lattice into a glass and subsequently into a pinned liquid phase. These vortex phases self-organize and produce relaxation plateaus in regions between steplike changes in the dependence of relaxation kinetics on hole doping.
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. | 88 | Pressure not reported | unknown |
| HgBa2Ca2Cu3O8+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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