Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy

Details Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy

2008-11-10

arxiv.org/abs/0811.1507v1

J. Phys. Soc. Jpn. 78, 034708 (2009)

Physics

Condensed Matter

Superconductivity

6 pages, 3 figures

Scientific paper

10.1143/JPSJ.78.034708

We have performed soft x-ray and ultrahigh-resolution laser-excited photoemission measurements on tetragonal FeSe, which was recently identified as a superconductor. Energy dependent study of valence band is compared to band structure calculations and yields a reasonable assignment of partial densities of states. However, the sharp peak near the Fermi level slightly deviates from the calculated energy position, giving rise to the necessity of self-energy correction. We have also performed ultrahigh-resolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

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