Surface geometric and electronic structures of BaFe2As2(001)

V. B. Nascimento; Ang Li; Dilushan R. Jayasundara; Yi Xuan; Jared O'Neal; Shuheng Pan; T. Y. Chien; Biao Hu; X. B. He; Guorong Li; A. S. Sefat; M. A. McGuire; B. C. Sales; D. Mandrus; M. H. Pan; Jiandi Zhang; R. Jin; E. W. Plummer

doi:10.1103/PhysRevLett.103.076104

Surface geometric and electronic structures of BaFe2As2(001)

V. B. Nascimento
, Ang Li
, Dilushan R. Jayasundara
, Yi Xuan
, Jared O'Neal
, Shuheng Pan
, T. Y. Chien
, Biao Hu
, X. B. He
, Guorong Li
, A. S. Sefat
, M. A. McGuire
, B. C. Sales
, D. Mandrus
, M. H. Pan
, Jiandi Zhang
, R. Jin
, E. W. Plummer

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

64 Scopus citations

Abstract

BaFe2As2 exhibits properties that are characteristic of the parent compounds of the newly discovered iron (Fe)-based high-TC superconductors. By combining real-space imaging of scanning tunneling microscopy and spectroscopy (STM+STS) with momentum-space quantitative low-energy electron diffraction (LEED), we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated Fe-As layer-the plane where superconductivity occurs. LEED and STM+STS data on the BaFe2As2(001) surface indicate an ordered arsenic (As) terminated metallic surface without reconstruction or lattice distortion. It is surprising that STM images the different Fe-As orbitals associated with the orthorhombic structure, but not the As atoms in the surface plane.

Original language	English
Article number	076104
Journal	Physical Review Letters
Volume	103
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevLett.103.076104
State	Published - Aug 14 2009

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10.1103/PhysRevLett.103.076104

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Nascimento, V. B., Li, A., Jayasundara, D. R., Xuan, Y., O'Neal, J., Pan, S., Chien, T. Y., Hu, B., He, X. B., Li, G., Sefat, A. S., McGuire, M. A., Sales, B. C., Mandrus, D., Pan, M. H., Zhang, J., Jin, R., & Plummer, E. W. (2009). Surface geometric and electronic structures of BaFe2As2(001). Physical Review Letters, 103(7), Article 076104. https://doi.org/10.1103/PhysRevLett.103.076104

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title = "Surface geometric and electronic structures of BaFe2As2(001)",

abstract = "BaFe2As2 exhibits properties that are characteristic of the parent compounds of the newly discovered iron (Fe)-based high-TC superconductors. By combining real-space imaging of scanning tunneling microscopy and spectroscopy (STM+STS) with momentum-space quantitative low-energy electron diffraction (LEED), we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated Fe-As layer-the plane where superconductivity occurs. LEED and STM+STS data on the BaFe2As2(001) surface indicate an ordered arsenic (As) terminated metallic surface without reconstruction or lattice distortion. It is surprising that STM images the different Fe-As orbitals associated with the orthorhombic structure, but not the As atoms in the surface plane.",

author = "Nascimento, \{V. B.\} and Ang Li and Jayasundara, \{Dilushan R.\} and Yi Xuan and Jared O'Neal and Shuheng Pan and Chien, \{T. Y.\} and Biao Hu and He, \{X. B.\} and Guorong Li and Sefat, \{A. S.\} and McGuire, \{M. A.\} and Sales, \{B. C.\} and D. Mandrus and Pan, \{M. H.\} and Jiandi Zhang and R. Jin and Plummer, \{E. W.\}",

year = "2009",

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doi = "10.1103/PhysRevLett.103.076104",

language = "English",

volume = "103",

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T1 - Surface geometric and electronic structures of BaFe2As2(001)

AU - Nascimento, V. B.

AU - Li, Ang

AU - Jayasundara, Dilushan R.

AU - Xuan, Yi

AU - O'Neal, Jared

AU - Pan, Shuheng

AU - Chien, T. Y.

AU - Hu, Biao

AU - He, X. B.

AU - Li, Guorong

AU - Sefat, A. S.

AU - McGuire, M. A.

AU - Sales, B. C.

AU - Mandrus, D.

AU - Pan, M. H.

AU - Zhang, Jiandi

AU - Jin, R.

AU - Plummer, E. W.

PY - 2009/8/14

Y1 - 2009/8/14

N2 - BaFe2As2 exhibits properties that are characteristic of the parent compounds of the newly discovered iron (Fe)-based high-TC superconductors. By combining real-space imaging of scanning tunneling microscopy and spectroscopy (STM+STS) with momentum-space quantitative low-energy electron diffraction (LEED), we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated Fe-As layer-the plane where superconductivity occurs. LEED and STM+STS data on the BaFe2As2(001) surface indicate an ordered arsenic (As) terminated metallic surface without reconstruction or lattice distortion. It is surprising that STM images the different Fe-As orbitals associated with the orthorhombic structure, but not the As atoms in the surface plane.

AB - BaFe2As2 exhibits properties that are characteristic of the parent compounds of the newly discovered iron (Fe)-based high-TC superconductors. By combining real-space imaging of scanning tunneling microscopy and spectroscopy (STM+STS) with momentum-space quantitative low-energy electron diffraction (LEED), we have identified the surface plane of cleaved BaFe2As2 crystals as the As terminated Fe-As layer-the plane where superconductivity occurs. LEED and STM+STS data on the BaFe2As2(001) surface indicate an ordered arsenic (As) terminated metallic surface without reconstruction or lattice distortion. It is surprising that STM images the different Fe-As orbitals associated with the orthorhombic structure, but not the As atoms in the surface plane.

UR - https://www.scopus.com/pages/publications/68949105454

U2 - 10.1103/PhysRevLett.103.076104

DO - 10.1103/PhysRevLett.103.076104

M3 - Article

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SN - 0031-9007

VL - 103

JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

M1 - 076104

ER -

Surface geometric and electronic structures of BaFe2As2(001)

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