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
- Issue Date
- 1997-07
- Publisher
- KOREAN PHYSICAL SOC
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.31, no.1, pp.19 - 22
- 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; HIGH-TEMPERATURE SUPERCONDUCTORS; VORTEX-GLASS SUPERCONDUCTIVITY; GAUGE GLASS; TRANSITION; MODEL; FLUCTUATIONS; TRANSPORT; high temperature superconductors; c-axis conduction; Bi₂Sr₂CaCu₂O8+x crystals
- ISSN
- 0374-4884
- URI
- https://pubs.kist.re.kr/handle/201004/143721
- Appears in Collections:
- KIST Article > Others
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.