Electronic structure of superconducting FeSe studied by high-resolution photoemission spectroscopy

Rikiya Yoshida; Takanori Wakita; Hiroyuki Okazaki; Yoshikazu Mizuguchi; Shunsuke Tsuda; Yoshihiko Takano; Hiroyuki Takeya; Kazuto Hirata; Takayuki Muro; Mario Okawa; Kyoko Ishizaka; Shik Shin; Hisatomo HArima; Masaaki Hirai; Yuji Muraoka; Takayoshi Yokoya

doi:10.1143/JPSJ.78.034708

Electronic structure of superconducting FeSe studied by high-resolution photoemission spectroscopy

Rikiya Yoshida, Takanori Wakita, Hiroyuki Okazaki, Yoshikazu Mizuguchi, Shunsuke Tsuda, Yoshihiko Takano, Hiroyuki Takeya, Kazuto Hirata, Takayuki Muro, Mario Okawa, Kyoko Ishizaka, Shik Shin, Hisatomo HArima, Masaaki Hirai, Yuji Muraoka, Takayoshi Yokoya

Research output: Contribution to journal › Article › peer-review

39 Citations (Scopus)

Abstract

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 ultrahighresolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

Original language	English
Article number	034708
Journal	journal of the physical society of japan
Volume	78
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.78.034708
Publication status	Published - Mar 2009

Keywords

Electronic structure
FeSe
Iron-based superconductor
Photoemission spectroscopy

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.78.034708

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Yoshida, R., Wakita, T., Okazaki, H., Mizuguchi, Y., Tsuda, S., Takano, Y., Takeya, H., Hirata, K., Muro, T., Okawa, M., Ishizaka, K., Shin, S., HArima, H., Hirai, M., Muraoka, Y., & Yokoya, T. (2009). Electronic structure of superconducting FeSe studied by high-resolution photoemission spectroscopy. journal of the physical society of japan, 78(3), Article 034708. https://doi.org/10.1143/JPSJ.78.034708

Yoshida, R, Wakita, T, Okazaki, H, Mizuguchi, Y, Tsuda, S, Takano, Y, Takeya, H, Hirata, K, Muro, T, Okawa, M, Ishizaka, K, Shin, S, HArima, H, Hirai, M, Muraoka, Y & Yokoya, T 2009, 'Electronic structure of superconducting FeSe studied by high-resolution photoemission spectroscopy', journal of the physical society of japan, vol. 78, no. 3, 034708. https://doi.org/10.1143/JPSJ.78.034708

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author = "Rikiya Yoshida and Takanori Wakita and Hiroyuki Okazaki and Yoshikazu Mizuguchi and Shunsuke Tsuda and Yoshihiko Takano and Hiroyuki Takeya and Kazuto Hirata and Takayuki Muro and Mario Okawa and Kyoko Ishizaka and Shik Shin and Hisatomo HArima and Masaaki Hirai and Yuji Muraoka and Takayoshi Yokoya",

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AU - Yoshida, Rikiya

AU - Wakita, Takanori

AU - Okazaki, Hiroyuki

AU - Mizuguchi, Yoshikazu

AU - Tsuda, Shunsuke

AU - Takano, Yoshihiko

AU - Takeya, Hiroyuki

AU - Hirata, Kazuto

AU - Muro, Takayuki

AU - Okawa, Mario

AU - Ishizaka, Kyoko

AU - Shin, Shik

AU - HArima, Hisatomo

AU - Hirai, Masaaki

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

PY - 2009/3

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N2 - 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 ultrahighresolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

AB - 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 ultrahighresolution laser photoemission experiment on FeSe and observed the suppression of intensity around the Fermi level upon cooling.

KW - Electronic structure

KW - FeSe

KW - Iron-based superconductor

KW - Photoemission spectroscopy

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Electronic structure of superconducting FeSe studied by high-resolution photoemission spectroscopy

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Keywords

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