Electronic Structure of Superconducting FeSe Studied by High-Resolution Photoemission Spectroscopy(Condensed matter: electronic structure and electrical, magnetic, and optical properties)

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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.
社団法人日本物理学会の論文
2009-03-15