論文

査読有り
2009年10月

Magnetic properties of the two-band Hubbard model with different bandwidths

PHYSICA B-CONDENSED MATTER
  • Yohta Koyama
  • ,
  • Akihisa Koga
  • ,
  • Norio Kawakami
  • ,
  • Philipp Werner

404
19
開始ページ
3267
終了ページ
3270
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.physb.2009.07.152
出版者・発行元
ELSEVIER SCIENCE BV

We investigate magnetic properties of the two-band Hubbard model with different bandwidths. By means of dynamical mean-field theory combined with the hybridization expansion continuous time quantum Monte Carlo method, we discuss how the difference in the bandwidths affects the magnetism at low temperatures. It is found that the nature of the magnetic phase transition is not affected by the difference in the bandwidths at half filling and thus a single phase transition occurs at the same critical temperature. By contrast, the introduction of holes induces an orbital-selective insulator-metal transition. The characteristic properties of the intermediate phase with one orbital localized and the other itinerant are also discussed. (c) 2009 Elsevier B.V. All rights reserved.

リンク情報
DOI
https://doi.org/10.1016/j.physb.2009.07.152
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000271357300101&DestApp=WOS_CPL
ID情報
  • DOI : 10.1016/j.physb.2009.07.152
  • ISSN : 0921-4526
  • eISSN : 1873-2135
  • Web of Science ID : WOS:000271357300101

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