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Surface reconstruction and charge modulation in BaFe2As2 superconducting film

Title
Surface reconstruction and charge modulation in BaFe2As2 superconducting film
Authors
Kim, S.Yi, S.Oh, M.Jang, B. G.Nam, W.Yoo, Y. C.Lee, M.Jeon, H.Zoh, I.Lee, H.Zhang, C.Kim, K. H.Seo, JungpilShim, J. H.Chae, J.Kuk, Y.
DGIST Authors
Seo, Jungpil
Issue Date
2018-08
Citation
Journal of Physics Condensed Matter, 30(31)
Type
Article
Article Type
Article
Keywords
surface structure of superconductorscanning tunneling microscopysuperconducting propertyPHASE-TRANSITIONS
ISSN
0953-8984
Abstract
Whether or not epitaxially grown superconducting films have the same bulk-like superconducting properties is an important concern. We report the structure and the electronic properties of epitaxially grown Ba(Fe1-xCox)2As2 films using scanning tunneling microscopy and scanning tunneling spectroscopy (STS). This film showed a different surface structure, R45° reconstruction, from those of as-cleaved surfaces from bulk crystals. The electronic structure of the grown film is different from that in bulk, and it is notable that the film exhibits the same superconducting transport properties. We found that the superconducting gap at the surface is screened at the Ba layer surface in STS measurements, and the charge density wave was observed at the surface in sample in the superconducting state. © 2018 IOP Publishing Ltd.
URI
http://hdl.handle.net/20.500.11750/9041
DOI
10.1088/1361-648X/aacd85
Publisher
Institute of Physics Publishing
Related Researcher
  • Author Seo, Jungpil Nanospm Lab(Advanced Materials Research Group)
  • Research Interests Topological Matters; High Tc Superconductors; Low dimensional Quantum Matters
Files:
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Collection:
Department of Emerging Materials ScienceNanospm Lab(Advanced Materials Research Group)1. Journal Articles


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