Journal
PHYSICAL REVIEW B
Volume 79, Issue 22, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.79.220503
Keywords
barium compounds; cobalt compounds; doping profiles; electronic structure; Fermi surface; high-temperature superconductors; iron compounds; photoemission; superconducting transition temperature
Funding
- NSF [DMR-0804902]
- U.S. Department of Energy [DE-AC0500OR22725]
- Direct For Mathematical & Physical Scien [0804902] Funding Source: National Science Foundation
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The electronic structure of electron-doped iron-arsenide superconductors Ba(Fe1-xCox)(2)As-2 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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