Absence of a Tunneling Character in c-axis Transport of SmFeAsO0.85 Single Crystals
- Authors
- Park, Jae-Hyun; Lee, Hyun-Sook; Lee, Hu-Jong; Cho, B. K.; Doh, Yong-Joo
- Issue Date
- 1월-2011
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Iron pnictide superconductor; Natural Josephson coupling; Anisotropy ratio
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.58, no.1, pp.77 - 82
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 58
- Number
- 1
- Start Page
- 77
- End Page
- 82
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/113354
- DOI
- 10.3938/jkps.58.77
- ISSN
- 0374-4884
- Abstract
- We made electrical transport measurements along the c-axis of SmFeAsO0.85 single crystals in both three- and four-terminal configurations, focusing on examining the possible formation of Josephson coupling between FeAs superconducting layers. Anisotropic bulk superconductivity was observed along the c-axis, but without Josephson coupling, as confirmed by the absence of both hysteresis in the current-voltage curves and modulation of the critical current by the in-plane magnetic fields. The variation of the critical currents for different magnetic-field directions gave an anisotropy ratio of gamma similar to 5. This three-dimensional electronic structure of our iron pnictide superconductors is in clear contrast to the two-dimensional one observed in cuprate superconductors, another stacked superconducting system.
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Collections - Graduate School > Department of Applied Physics > 1. Journal Articles
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