Vortex-boson analogy and the nonlinear response function in high-Tc superconductors near the phase transition
H. D. Chen, Y. Wang, D. L. Yin, Y. L. Zhu, K. X. Chen, C. Y. Li, G. Lu
DOI 10.1103/PhysRevB.61.1468 · Physical Review B
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Abstract
The physics of flux lines in a high-Tc superconductor pinned by strongly correlated defects can be mapped onto charged bosons localized in two dimensions (2D). Considering the viscous dissipation of moving vortices, we derive a nonlinear response function. This function is compatible with so far suggested different model barriers U(J) and able to make a consistent description of the vortex system near transition. A comparison with the scaling behavior of the measured isothermal current-voltage curves with YBa2Cu3O7−δ (YBCO) samples shows fair agreement. This nonlinear response function also shows an empirical fit with I−V behavior of some 2D charge systems.
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. | 78 | Pressure not reported | unknown |
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 78 | Pressure not reported | unknown |
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