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

Correlated Electron Materials

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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

Funding

Funders	Funder number
Directorate for Mathematical and Physical Sciences	0451163, 0346826

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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.}",

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doi = "10.1103/PhysRevLett.103.076104",

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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.

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 7

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ER -

Surface geometric and electronic structures of BaFe2As2(001)

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