Surface-driven electronic structure in LaFeAsO studied by angle-resolved photoemission spectroscopy

Chang Liu; Yongbin Lee; A. D. Palczewski; J. Q. Yan; Takeshi Kondo; B. N. Harmon; R. W. McCallum; T. A. Lograsso; A. Kaminski

doi:10.1103/PhysRevB.82.075135

Surface-driven electronic structure in LaFeAsO studied by angle-resolved photoemission spectroscopy

Chang Liu, Yongbin Lee, A. D. Palczewski, J. Q. Yan, Takeshi Kondo, B. N. Harmon, R. W. McCallum, T. A. Lograsso, A. Kaminski

Correlated Electron Materials

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Abstract

We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle-resolved photoemission spectroscopy (ARPES). By comparing with a full-potential linear augmented plane wave calculation we show that the extra large Γ hole pocket measured via ARPES comes from electronic structure at the sample surface. Based on this we discuss the strong-polarization dependence of the band structure and a temperature-dependent holelike band around the M point. The two phenomena give additional evidences for the existence of the surface-driven electronic structure.

Original language	English
Article number	075135
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	82
Issue number	7
DOIs	https://doi.org/10.1103/PhysRevB.82.075135
State	Published - Aug 26 2010

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title = "Surface-driven electronic structure in LaFeAsO studied by angle-resolved photoemission spectroscopy",

abstract = "We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle-resolved photoemission spectroscopy (ARPES). By comparing with a full-potential linear augmented plane wave calculation we show that the extra large Γ hole pocket measured via ARPES comes from electronic structure at the sample surface. Based on this we discuss the strong-polarization dependence of the band structure and a temperature-dependent holelike band around the M point. The two phenomena give additional evidences for the existence of the surface-driven electronic structure.",

author = "Chang Liu and Yongbin Lee and Palczewski, {A. D.} and Yan, {J. Q.} and Takeshi Kondo and Harmon, {B. N.} and McCallum, {R. W.} and Lograsso, {T. A.} and A. Kaminski",

year = "2010",

month = aug,

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doi = "10.1103/PhysRevB.82.075135",

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AU - Liu, Chang

AU - Lee, Yongbin

AU - Palczewski, A. D.

AU - Yan, J. Q.

AU - Kondo, Takeshi

AU - Harmon, B. N.

AU - McCallum, R. W.

AU - Lograsso, T. A.

AU - Kaminski, A.

PY - 2010/8/26

Y1 - 2010/8/26

N2 - We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle-resolved photoemission spectroscopy (ARPES). By comparing with a full-potential linear augmented plane wave calculation we show that the extra large Γ hole pocket measured via ARPES comes from electronic structure at the sample surface. Based on this we discuss the strong-polarization dependence of the band structure and a temperature-dependent holelike band around the M point. The two phenomena give additional evidences for the existence of the surface-driven electronic structure.

AB - We measured the electronic structure of an iron arsenic parent compound LaFeAsO using angle-resolved photoemission spectroscopy (ARPES). By comparing with a full-potential linear augmented plane wave calculation we show that the extra large Γ hole pocket measured via ARPES comes from electronic structure at the sample surface. Based on this we discuss the strong-polarization dependence of the band structure and a temperature-dependent holelike band around the M point. The two phenomena give additional evidences for the existence of the surface-driven electronic structure.

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DO - 10.1103/PhysRevB.82.075135

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VL - 82

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 7

M1 - 075135

ER -

Surface-driven electronic structure in LaFeAsO studied by angle-resolved photoemission spectroscopy

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