論文

査読有り
2018年2月15日

Observation of a Pseudogap in the Vicinity of the Metal–Insulator Transition in the Perovskite-type Vanadium Oxides Nd1−xSrxVO3

Journal of the Physical Society of Japan
  • 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
  • 全て表示

87
2
開始ページ
024708
終了ページ
024708
記述言語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/jpsj.87.024708
出版者・発行元
Physical Society of Japan

We have performed a photoemission study of the Mott–Hubbard system Nd1−xSrxVO3 (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.

リンク情報
DOI
https://doi.org/10.7566/jpsj.87.024708
URL
http://journals.jps.jp/doi/pdf/10.7566/JPSJ.87.024708
Scopus
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85040764310&origin=inward
Scopus Citedby
https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=85040764310&origin=inward
ID情報
  • DOI : 10.7566/jpsj.87.024708
  • ISSN : 0031-9015
  • eISSN : 1347-4073
  • ORCIDのPut Code : 78934817
  • SCOPUS ID : 85040764310

エクスポート
BibTeX RIS