Enhancement of interlayer phase coherence in the vortex liquid state of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+y} with columnar defects
The authors studied the phase coherence in the vortex liquid state of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+y} with columnar defects (CDs) using Josephson plasma resonance. The phase coherence as a function of magnetic field is nonmonotonic in samples with higher density of CDs, and they observe multiple resonance peaks in a limited temperature range. The characteristic field H* for the enhancement of the phase coherence normalized by the matching field (B{sub {Phi}}) is constant between 1/5 and 1/3 for samples with larger B{sub {Phi}}, while H* is constant in samples with smaller B{sub {Phi}}. In samples with CDs introduced at angles from the c-axis, H* is determined only by the density of CDs in the CuO{sub 2} layers. In a sample with CDs at 80{degree} from the c-axis, a large enhancement of the phase coherence was observed when the field is applied parallel to the direction of CDs and clear triple resonance peaks are observed.
- Research Organization:
- Univ. of Tokyo (JP)
- OSTI ID:
- 20015320
- Journal Information:
- Journal of Low Temperature Physics, Vol. 117, Issue 5-6; Conference: International Conference on Physics and Chemistry of Molecular and Oxide Superconductors, Stockholm (SE), 07/28/1999--08/02/1999; Other Information: PBD: Dec 1999; ISSN 0022-2291
- Country of Publication:
- United States
- Language:
- English
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