Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5

Madhab Neupane, Chang Liu, Su Yang Xu, Yung Jui Wang, Ni Ni, J. M. Allred, L. A. Wray, N. Alidoust, Hsin Lin, R. S. Markiewicz, A. Bansil, R. J. Cava, M. Z. Hasan

    Research output: Contribution to journalArticle

    Abstract

    We report a study of low-energy electronic structure and Fermi surface topology for the recently discovered iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5 (the 10-3-8 phase, with T c∼8 K), via angle-resolved photoemission spectroscopy (ARPES). Despite its triclinic crystal structure, ARPES results reveal a fourfold symmetric band structure with the absence of Dirac-cone-like Fermi dots (related to magnetism) found around the Brillouin zone corners in other iron-based superconductors. Considering that the triclinic lattice and structural supercell arise from the Pt 3As 8 intermediary layers, these results indicate that those layers couple only weakly to the FeAs layers in this new superconductor at least near the surface, which has implications for the determination of its pairing mechanism.

    Original languageEnglish (US)
    Article number094510
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume85
    Issue number9
    DOIs
    StatePublished - Mar 20 2012

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    Fermi surface
    Photoelectron spectroscopy
    Fermi surfaces
    Electronic structure
    topology
    Topology
    electronic structure
    iron
    Magnetism
    photoelectric emission
    Band structure
    Superconducting materials
    Cones
    Crystal structure
    Brillouin zones
    spectroscopy
    cones
    crystal structure
    Iron-based Superconductors
    energy

    ASJC Scopus subject areas

    • Condensed Matter Physics
    • Electronic, Optical and Magnetic Materials

    Cite this

    Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5 . / Neupane, Madhab; Liu, Chang; Xu, Su Yang; Wang, Yung Jui; Ni, Ni; Allred, J. M.; Wray, L. A.; Alidoust, N.; Lin, Hsin; Markiewicz, R. S.; Bansil, A.; Cava, R. J.; Hasan, M. Z.

    In: Physical Review B - Condensed Matter and Materials Physics, Vol. 85, No. 9, 094510, 20.03.2012.

    Research output: Contribution to journalArticle

    Neupane, M, Liu, C, Xu, SY, Wang, YJ, Ni, N, Allred, JM, Wray, LA, Alidoust, N, Lin, H, Markiewicz, RS, Bansil, A, Cava, RJ & Hasan, MZ 2012, 'Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5 ', Physical Review B - Condensed Matter and Materials Physics, vol. 85, no. 9, 094510. https://doi.org/10.1103/PhysRevB.85.094510
    Neupane, Madhab ; Liu, Chang ; Xu, Su Yang ; Wang, Yung Jui ; Ni, Ni ; Allred, J. M. ; Wray, L. A. ; Alidoust, N. ; Lin, Hsin ; Markiewicz, R. S. ; Bansil, A. ; Cava, R. J. ; Hasan, M. Z. / Fermi-surface topology and low-lying electronic structure of the iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5 . In: Physical Review B - Condensed Matter and Materials Physics. 2012 ; Vol. 85, No. 9.
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    abstract = "We report a study of low-energy electronic structure and Fermi surface topology for the recently discovered iron-based superconductor Ca 10(Pt 3As 8)(Fe 2As 2) 5 (the 10-3-8 phase, with T c∼8 K), via angle-resolved photoemission spectroscopy (ARPES). Despite its triclinic crystal structure, ARPES results reveal a fourfold symmetric band structure with the absence of Dirac-cone-like Fermi dots (related to magnetism) found around the Brillouin zone corners in other iron-based superconductors. Considering that the triclinic lattice and structural supercell arise from the Pt 3As 8 intermediary layers, these results indicate that those layers couple only weakly to the FeAs layers in this new superconductor at least near the surface, which has implications for the determination of its pairing mechanism.",
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    AU - Liu, Chang

    AU - Xu, Su Yang

    AU - Wang, Yung Jui

    AU - Ni, Ni

    AU - Allred, J. M.

    AU - Wray, L. A.

    AU - Alidoust, N.

    AU - Lin, Hsin

    AU - Markiewicz, R. S.

    AU - Bansil, A.

    AU - Cava, R. J.

    AU - Hasan, M. Z.

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