Anomalous momentum dependence of the multiband electronic structure of FeSe1-xTex Superconductors induced by atomic disorder

Takaaki Sudayama, Daiki Ootsuki, Yuki Wakisaka, Takashi Mizokawa, Naurang L. Saini, Masashi Arita, Hirofumi Namatame, Masaki Taniguchi, Takashi Noji, Yoji Koike

研究成果: Article

3 引用 (Scopus)

抄録

When periodicity of crystal is disturbed by atomic disorder, its electronic state tends to be inhomogeneous and band dispersion is expected to be obscured. In case of Fe-based superconductors, disorder of chalcogen/pnictogen height is known to cause disorder of Fe 3d level splitting. Here, we report an angle-resolved photoemission spectroscopy study on FeSe1-xTe x with the chalcogen height disorder, showing that the disorder affects the Fe 3d band dispersions in an orbital-selective way instead of simple obscuring effect. The reverse of the Fe 3d level splitting due to the chalcogen height difference causes the splitting of the hole band with Fe 3d x2-y2 character around the Γ point.

元の言語English
記事番号053705
ジャーナルJournal of the Physical Society of Japan
82
発行部数5
DOI
出版物ステータスPublished - 2013 5
外部発表Yes

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disorders
electronic structure
momentum
causes
periodic variations
photoelectric emission
orbitals
electronics
spectroscopy
crystals

ASJC Scopus subject areas

  • Physics and Astronomy(all)

これを引用

Anomalous momentum dependence of the multiband electronic structure of FeSe1-xTex Superconductors induced by atomic disorder. / Sudayama, Takaaki; Ootsuki, Daiki; Wakisaka, Yuki; Mizokawa, Takashi; Saini, Naurang L.; Arita, Masashi; Namatame, Hirofumi; Taniguchi, Masaki; Noji, Takashi; Koike, Yoji.

:: Journal of the Physical Society of Japan, 巻 82, 番号 5, 053705, 05.2013.

研究成果: Article

Sudayama, T, Ootsuki, D, Wakisaka, Y, Mizokawa, T, Saini, NL, Arita, M, Namatame, H, Taniguchi, M, Noji, T & Koike, Y 2013, 'Anomalous momentum dependence of the multiband electronic structure of FeSe1-xTex Superconductors induced by atomic disorder', Journal of the Physical Society of Japan, 巻. 82, 番号 5, 053705. https://doi.org/10.7566/JPSJ.82.053705
Sudayama, Takaaki ; Ootsuki, Daiki ; Wakisaka, Yuki ; Mizokawa, Takashi ; Saini, Naurang L. ; Arita, Masashi ; Namatame, Hirofumi ; Taniguchi, Masaki ; Noji, Takashi ; Koike, Yoji. / Anomalous momentum dependence of the multiband electronic structure of FeSe1-xTex Superconductors induced by atomic disorder. :: Journal of the Physical Society of Japan. 2013 ; 巻 82, 番号 5.
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abstract = "When periodicity of crystal is disturbed by atomic disorder, its electronic state tends to be inhomogeneous and band dispersion is expected to be obscured. In case of Fe-based superconductors, disorder of chalcogen/pnictogen height is known to cause disorder of Fe 3d level splitting. Here, we report an angle-resolved photoemission spectroscopy study on FeSe1-xTe x with the chalcogen height disorder, showing that the disorder affects the Fe 3d band dispersions in an orbital-selective way instead of simple obscuring effect. The reverse of the Fe 3d level splitting due to the chalcogen height difference causes the splitting of the hole band with Fe 3d x2-y2 character around the Γ point.",
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AU - Sudayama, Takaaki

AU - Ootsuki, Daiki

AU - Wakisaka, Yuki

AU - Mizokawa, Takashi

AU - Saini, Naurang L.

AU - Arita, Masashi

AU - Namatame, Hirofumi

AU - Taniguchi, Masaki

AU - Noji, Takashi

AU - Koike, Yoji

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AB - When periodicity of crystal is disturbed by atomic disorder, its electronic state tends to be inhomogeneous and band dispersion is expected to be obscured. In case of Fe-based superconductors, disorder of chalcogen/pnictogen height is known to cause disorder of Fe 3d level splitting. Here, we report an angle-resolved photoemission spectroscopy study on FeSe1-xTe x with the chalcogen height disorder, showing that the disorder affects the Fe 3d band dispersions in an orbital-selective way instead of simple obscuring effect. The reverse of the Fe 3d level splitting due to the chalcogen height difference causes the splitting of the hole band with Fe 3d x2-y2 character around the Γ point.

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KW - Inhomogeneity

KW - Orbital degeneracy

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