Observation of a truly superconducting phase in the c-axis conduction of Bi2Sr2CaCu2O8+x single crystal in zero magnetic field
SCIE
SCOPUS
- Title
- Observation of a truly superconducting phase in the c-axis conduction of Bi2Sr2CaCu2O8+x single crystal in zero magnetic field
- Authors
- Doh, YJ; Chung, MY; Chang, HS; Lee, HJ
- Date Issued
- 1997-07
- Publisher
- KOREAN PHYSICAL SOC
- Abstract
- We report results on isothermal current-voltage (IV) measurements of a Bi2Sr2CaCu2O8+x single crystal taken both in the ab-plane and along the c-axis in zero magnetic field. Decreasing the temperature, a bulk zero-resistance state develops in sequence characterized by three temperatures, T-c(c), T-g, and T-c(ab). In the temperature range of T > T-c(ab), the in-plane IV curves are all ohmic. The out-of-plane IV curves show very diverse behaviors; ohmic in the high-temperature region above T-c(c), highly nonlinear with an ohmic tail consistent with the effect of thermal fluctuations on Josephson coupling between Cu-O layers for T-g < T < T-c(c), and a down-turn behavior in logarithmic scale showing a true superconducting state with zero linear resistance for T < T-g. This down-turn of the c-axis IV curves is reminiscent of the vortex-glass behavior seen in the in-plane resistivities in an external magnetic field and cannot be explained by the conventional interlayer Josephson coupling model with thermal fluctuation effects.
- Keywords
- HIGH-TEMPERATURE SUPERCONDUCTORS; VORTEX-GLASS SUPERCONDUCTIVITY; GAUGE GLASS; TRANSITION; MODEL; FLUCTUATIONS; TRANSPORT
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21268
- ISSN
- 0374-4884
- Article Type
- Article
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, vol. 31, no. 1, page. 19 - 22, 1997-07
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