Nature of the Irreversibility Line in High-Temperature Superconductors
M. I. J. Probert, A. I. M. Rae
DOI 10.1103/PhysRevLett.75.1835 · Physical Review Letters
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Abstract
We have performed molecular dynamic simulations of an ensemble of rigid flux lines interacting according to the London model for different pinning strengths. We have studied the equilibrium state and calculated EJ curves over a range of temperatures and fields. Analysis of the resulting data shows that the unpinned lattice undergoes a genuine melting transition at the irreversibility line, while weak pins turn the low-temperature phase into a glass. In the case of strong pins, collective effects cease to be important and the irreversibility line simply marks the onset of observable thermally activated depinning.
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. | 100 | Pressure not reported | unknown |
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