Evidence for linelike vortex liquid phase in Tl2Ba2CaCu2O8 probed by the Josephson plasma resonance
V. K. Thorsmølle, R. D. Averitt, M. P. Maley, M. F. Hundley, A. E. Koshelev, L. N. Bulaevskii, A. J. Taylor
DOI 10.1103/PhysRevB.66.012519 · Physical Review B
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Abstract
We measured the Josephson plasma resonance (JPR) in optimally doped Tl2Ba2CaCu2O8+δ thin films using terahertz time-domain spectroscopy in transmission. The temperature and magnetic field dependence of the JPR frequency shows that the c-axis correlations of pancake vortices remain intact at the transition from the vortex solid to the liquid phase. In this respect Tl2Ba2CaCu2O8+δ films, with anisotropy parameter γ≈150, are similar to the less anisotropic YBa2Cu3O7−δ (γ≈8) rather than to the most anisotropic Bi2Sr2CaCu2O8+δ single crystals (γ⩾500).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Tl2Ba2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 103.4 | Pressure not reported | unknown |
| Tl2Ba2CaCu2O8+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 103.4 | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| Bi2Sr2CaCu2O8+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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