論文

査読有り 筆頭著者 責任著者
2007年4月13日

Coexistence of Strongly Mixed-Valence and Heavy-Fermion Character inSmOs4Sb12Studied by Soft- and Hard-X-Ray Spectroscopy

Physical Review Letters
  • A. Yamasaki
  • S. Imada
  • H. Higashimichi
  • H. Fujiwara
  • T. Saita
  • T. Miyamachi
  • A. Sekiyama
  • H. Sugawara
  • D. Kikuchi
  • H. Sato
  • A. Higashiya
  • M. Yabashi
  • K. Tamasaku
  • D. Miwa
  • T. Ishikawa
  • S. Suga
  • 全て表示

98
15
開始ページ
156402
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/physrevlett.98.156402
出版者・発行元
American Physical Society (APS)

Sm-based heavy-fermion compound SmOs4Sb12 has been investigated by soft x-ray (h nu = 1070 - 1600 eV) and hard x-ray (HX; h nu = 7932 eV) spectroscopy. The HX photoemission spectroscopy clearly demonstrates that the strongly mixed-valence state and the heavy-fermion state coexist in the bulk. It is found that the Sm valence decreases below 100 K, indicating that the Kondo coherence develops with approaching the proposed Kondo temperature. Our theoretical analyses suggest that the origin of the coexistence in SmOs4Sb12 is the coincidence of two conditions, namely, (i) the energy difference between Sm divalent and trivalent states is very small and (ii) the hybridization between Sm 4f and conduction electrons is weak.

リンク情報
DOI
https://doi.org/10.1103/physrevlett.98.156402
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000245691400046&DestApp=WOS_CPL
URL
http://link.aps.org/article/10.1103/PhysRevLett.98.156402
URL
http://harvest.aps.org/v2/journals/articles/10.1103/PhysRevLett.98.156402/fulltext
ID情報
  • DOI : 10.1103/physrevlett.98.156402
  • ISSN : 0031-9007
  • eISSN : 1079-7114
  • Web of Science ID : WOS:000245691400046

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