Surface reconstruction and charge modulation in BaFe2As2 superconducting film

S. Kim; S. Yi; M. Oh; B. G. Jang; W. Nam; Y. C. Yoo; M. Lee; H. Jeon; I. Zoh; H. Lee; C. Zhang; K. H. Kim; J. Seo; J. H. Shim; J. Chae; Y. Kuk

doi:10.1088/1361-648X/aacd85

Surface reconstruction and charge modulation in BaFe₂As₂ superconducting film

S. Kim, S. Yi, M. Oh, B. G. Jang, W. Nam, Y. C. Yoo, M. Lee, H. Jeon, I. Zoh, H. Lee, C. Zhang, K. H. Kim, J. Seo, J. H. Shim, J. Chae, Y. Kuk

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

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(Fe_1-xCo_x)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.

Original language	English
Article number	315001
Journal	Journal of Physics Condensed Matter
Volume	30
Issue number	31
DOIs	https://doi.org/10.1088/1361-648X/aacd85
State	Published - Jul 6 2018
Externally published	Yes

Keywords

scanning tunneling microscopy
superconducting property
surface structure of superconductor

Access to Document

10.1088/1361-648X/aacd85

Cite this

@article{64e0aaf106ba41f4a5e51ab037e6aa75,

title = "Surface reconstruction and charge modulation in BaFe2As2 superconducting film",

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.",

keywords = "scanning tunneling microscopy, superconducting property, surface structure of superconductor",

author = "S. Kim and S. Yi and M. Oh and Jang, {B. G.} and W. Nam and Yoo, {Y. C.} and M. Lee and H. Jeon and I. Zoh and H. Lee and C. Zhang and Kim, {K. H.} and J. Seo and Shim, {J. H.} and J. Chae and Y. Kuk",

note = "Publisher Copyright: {\textcopyright} 2018 IOP Publishing Ltd.",

year = "2018",

month = jul,

day = "6",

doi = "10.1088/1361-648X/aacd85",

language = "English",

volume = "30",

journal = "Journal of Physics Condensed Matter",

issn = "0953-8984",

publisher = "IOP Publishing",

number = "31",

}

TY - JOUR

T1 - Surface reconstruction and charge modulation in BaFe2As2 superconducting film

AU - Kim, S.

AU - Yi, S.

AU - Oh, M.

AU - Jang, B. G.

AU - Nam, W.

AU - Yoo, Y. C.

AU - Lee, M.

AU - Jeon, H.

AU - Zoh, I.

AU - Lee, H.

AU - Zhang, C.

AU - Kim, K. H.

AU - Seo, J.

AU - Shim, J. H.

AU - Chae, J.

AU - Kuk, Y.

PY - 2018/7/6

Y1 - 2018/7/6

N2 - 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.

AB - 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.

KW - scanning tunneling microscopy

KW - superconducting property

KW - surface structure of superconductor

UR - http://www.scopus.com/inward/record.url?scp=85050571195&partnerID=8YFLogxK

U2 - 10.1088/1361-648X/aacd85

DO - 10.1088/1361-648X/aacd85

M3 - Article

C2 - 29916822

AN - SCOPUS:85050571195

SN - 0953-8984

VL - 30

JO - Journal of Physics Condensed Matter

JF - Journal of Physics Condensed Matter

IS - 31

M1 - 315001

ER -

Surface reconstruction and charge modulation in BaFe₂As₂ superconducting film

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this