Coupling Transition of the Vortex Liquid in Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{ital {delta} }} with Columnar Defects
- Institute for Solid State Physics, University of Tokyo, Minato-ku, Roppongi, Tokyo 106 (Japan)
- Department of Physics, Aoyama-Gakuin University, Setagaya-ku, Chitosedai, Tokyo 157 (Japan)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)
- Superconductivity Research Laboratory, ISTEC, Minato-ku, Tokyo 105 (Japan)
- Laboratoire des Solides Irradies, Ecole Polytechnique, Palaiseau, 91128 (France)
- Department of Superconductivity, University of Tokyo, Bunkyo-ku, Tokyo 113 (Japan)
- National Research Institute for Metals, 1-2-1 Sengen, Tsukuba, Ibaraki 305 (Japan)
- Department of Physics, Hokkaido University, Sapporo 060 (Japan)
The interlayer Josephson coupling in the vortex fluid phase of heavy-ion irradiated Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} is probed by Josephson plasma resonance. The introduction of columnar defects changes the nature of the vortex liquid dramatically. We show that two types of vortex liquid, the well-coupled and the decoupled pancake vortex liquids, appear in the irradiated crystals. The pancake vortices tend to couple with increasing magnetic field, which is opposite to the pristine crystal. The double resonance peaks appear as a function of field in a narrow temperature range well above the irreversibility line. This implies an occurrence of the coupling transition in the liquid phase. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 554007
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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