2010/01/06 by Fei Chen, Bo Zhou, Yan Zhang +21 · 5 citations
Business, Management and Accounting · Chemistry · Materials Science · Mathematics · Physics and Astronomy · #Chemistry #Condensed matter physics #Corporate Taxation and Avoidance #Crystallography #Density functional theory #Electronic band structure #Electronic structure #Fermi level #Fermi surface #Geometry #Iron-based superconductors research #Materials science #Mathematics #Nuclear magnetic resonance #Photoemission spectroscopy #Physics #Quantum mechanics #Rare-earth and actinide compounds #Superconductivity #Symmetry (geometry) #X-ray photoelectron spectroscopy #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.81.014526
published as Phys. Rev. B 81, 014526 (2010) · 7 pages, 9 figures. submitted to PRB on November 15, 2009, and accepted on January 6, 2010
arxiv created 2010/01/06 · openalex publication_date 2010/01/28 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We report the electronic structure of the iron-chalcogenide superconductor, Fe1.04(Te0.66Se0.34), obtained with high-resolution angle-resolved photoemission spectroscopy and density-functional calculations. In photoemission measurements, various photon energies and polarizations are exploited to study the Fermi surface topology and symmetry properties of the bands. The measured band structure and their symmetry characters qualitatively agree with our density-functional theory calculations of Fe(Te0.66Se0.34), although the band structure is renormalized by about a factor of three. We find that the electronic structures of this iron chalcogenides and the iron pnictides have many aspects in common; however, significant differences exist near the \ensuremathΓ point. For Fe1.04Te0.66Se0.34, there are clearly separated three bands with distinct even or odd symmetry that cross the Fermi energy (EF) near the zone center, which contribute to three holelike Fermi surfaces. Especially, both experiments and calculations show a holelike elliptical Fermi surface at the zone center. Moreover, no sign of spin density wave was observed in the electronic structure and susceptibility measurements of this compound.