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Bulk electronic structure of optimally doped Ba(Fe1-xCox)2As2

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Utfeld, C., Laverock, J., Haynes, T. D., Dugdale, S. B., Duffy, J. A., Butchers, M. W., Taylor, J. W., Giblin, S. R., Analytis, J. G., Chu, J. -H., Fisher, I. R., Itou, M. and Sakurai, Y. (2010) Bulk electronic structure of optimally doped Ba(Fe1-xCox)2As2. Physical Review B, Vol.81 (No.6). Article no. 064509. doi:10.1103/PhysRevB.81.064509

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Official URL: http://dx.doi.org/10.1103/PhysRevB.81.064509

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Abstract

We report high-resolution, bulk Compton scattering measurements unveiling the Fermi surface of an optimally doped iron-arsenide superconductor, Ba(Fe0.93Co0.07)(2)As-2. Our measurements are in agreement with first-principles calculations of the electronic structure, revealing both the X-centered electron pockets and the Gamma-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, chi(0)(q,omega), 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: Journal Article
Subjects: Q Science > QC Physics
Divisions: Faculty of Science > Physics
Journal or Publication Title: Physical Review B
Publisher: American Physical Society
ISSN: 1098-0121
Official Date: February 2010
Dates:
DateEvent
February 2010Published
Volume: Vol.81
Number: No.6
Number of Pages: 5
Page Range: Article no. 064509
DOI: 10.1103/PhysRevB.81.064509
Status: Peer Reviewed
Publication Status: Published
Access rights to Published version: Restricted or Subscription Access
Funder: Engineering and Physical Sciences Research Council (EPSRC), Department of Energy, Office of Basic Energy Sciences
Grant number: DE-AC02-76SF00515

Data sourced from Thomson Reuters' Web of Knowledge

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