Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors

P. Vilmercati; A. Fedorov; I. Vobornik; Manju U.; G. Panaccione; A. Goldoni; A. S. Sefat; M. A. McGuire; B. C. Sales; R. Jin; D. Mandrus; D. J. Singh; N. Mannella

doi:10.1103/physrevb.79.220503

arXiv · 0902.0756

Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors

P. Vilmercati·A. Fedorov·I. Vobornik·Manju U.·G. Panaccione·A. Goldoni·A. S. Sefat·M. A. McGuire·B. C. Sales·R. Jin·D. Mandrus·D. J. Singh·N. Mannella

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Abstract

The electronic structure of electron doped iron-arsenide superconductors Ba(Fe1- xCox)2As2 has been measured with Angle Resolved Photoemission Spectroscopy. The data reveal a marked photon energy dependence of points in momentum space where the bands cross the Fermi energy, a distinctive and direct signature of three-dimensionality in the Fermi surface topology. By providing a unique example of high temperature superconductivity hosted in layered compounds with three-dimensional electronic structure, these findings suggest that the iron-arsenides are unique materials, quite different from the cuprates high temperature superconductors.

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P. Vilmercati, A. Fedorov, I. Vobornik, Manju U., G. Panaccione, A. Goldoni, A. S. Sefat, M. A. McGuire, B. C. Sales, R. Jin, D. Mandrus, D. J. Singh, N. Mannella. 2009-06-05. Evidence for Three-Dimensionality in the Fermi Surface Topology of Layered Electron Doped Ba(Fe1-XCox)2As2 Iron Superconductors. https://doi.org/10.1103/physrevb.79.220503

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