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Updated: Feb 8, 2026

Fabrication and Characterization of Superconducting Resonators
Published on: May 21, 2016
Surface reconstruction and charge modulation in BaFe2As2 superconducting film
1Department of Physics and Astronomy, Seoul National University, Seoul 08826, Republic of Korea.
None:
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-x Co x )2As2 films using scanning tunneling microscopy and scanning tunneling spectroscopy (STS). This film showed a different surface structure, [Formula: see text]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.
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