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Bulk electronic structure of optimally doped Ba(Fe1-xCox)(2)As-2

Utfeld, C., Laverock, J., Haynes, T. D., Dugdale, S. B., Duffy, J. A., Butchers, M. W., Taylor, J. W., Giblin, Sean ORCID:, Analytis, J. G., Chu, J. H., Fisher, I. R., Itou, M. and Sakurai, Y. 2010. Bulk electronic structure of optimally doped Ba(Fe1-xCox)(2)As-2. Physical Review B Condensed Matter and Materials Physics 81 (6) , 064509-064514. 10.1103/PhysRevB.81.064509

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We report high-resolution, bulk Compton scattering measurements unveiling the Fermi surface of an optimally doped iron-arsenide superconductor, Ba(Fe0.93Co0.07)2As2. Our measurements are in agreement with first-principles calculations of the electronic structure, revealing both the X-centered electron pockets and the Γ-centered hole pockets. Moreover, our data are consistent with the strong three dimensionality of one of these sheets that has been predicted by electronic structure calculations at the local-density-approximation-minimum As position. Complementary calculations of the noninteracting susceptibility, χ0(q,ω), suggest that the broad peak that develops due to interband Fermi-surface nesting, and which has motivated several theories of superconductivity in this class of material, survives the measured three dimensionality of the Fermi surface in this family.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: American Physical Society
ISSN: 1098-0121
Last Modified: 21 Oct 2022 10:50

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