Evidence for linelike vortex liquid phase in Tl{sub 2}Ba{sub 2}CaCu(sub 2}O{sub 8} probed by the Josephson plasma resonance.
We measured the Josephson plasma resonance (JPR) in optimally doped Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8+{delta}} 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 Tl{sub 2}Ba{sub 2}CaCu{sub 2}O{sub 8+{delta}} films, with anisotropy parameter {gamma}{approx}150, are similar to the less anisotropic YBa{sub 2}Cu{sub 3}O{sub 7-{delta}} ({gamma}{approx}8) rather than to the most anisotropic Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} single crystals ({gamma}{approx}500).
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC); OUS
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 949504
- Report Number(s):
- ANL/MSD/JA-41579; PRBMDO; TRN: US1003558
- Journal Information:
- Phys. Rev. B, Vol. 66, Issue 1 ; Jul. 1, 2002; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- ENGLISH
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