Observation of a pseudogap in the vicinity of the metal–insulator transition in the perovskite-type vanadium oxides Nd1−xSrxVO3

Shintaro Yamamoto, Daiki Ootsuki, Daiya Shimonaka, Daisuke Shibata, Kenjiro Kodera, Mario Okawa, Tomohiko Saitoh, Masafumi Horio, Atsushi Fujimori, Hiroshi Kumigashira, Kanta Ono, Eiji Ikenaga, Shigeki Miyasaka, Setsuko Tajima, Teppei Yoshida

研究成果: Article査読

抄録

We have performed a photoemission study of the Mott–Hubbard system Nd1xSrxVO3 (x = 0.20 and 0.30) to investigate the electronic structure in the vicinity of the metal–insulator transition. By using bulk sensitive hard X-ray photoemission spectroscopy, we have observed a large coherent spectral weight near the Fermi level compared to those observed with surface-sensitive low photons. In particular, a pseudogap with an energy of ~0.2 eV has been observed near the Fermi level, which is consistent with a prediction with a dynamical cluster approximation calculation. In order to understand the characteristic features in the Mott–Hubbard-type metal–insulator transition, particularly the pseudogap opening at x = 0.2 and 0.3, a phenomenological model of the self-energy has been proposed.

本文言語English
論文番号024708
ジャーナルjournal of the physical society of japan
87
2
DOI
出版ステータスPublished - 2018
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

フィンガープリント 「Observation of a pseudogap in the vicinity of the metal–insulator transition in the perovskite-type vanadium oxides Nd<sub>1−x</sub>Sr<sub>x</sub>VO<sub>3</sub>」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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