論文

査読有り
2012年

P-concentration dependence of the quasiparticle density of states in BaFe2(As1-xPx)(2)

INTERNATIONAL CONFERENCE ON STRONGLY CORRELATED ELECTRON SYSTEMS (SCES 2011)
  • Tetsuya Iye
  • ,
  • Yusuke Nakai
  • ,
  • Shunsaku Kitagawa
  • ,
  • Kenji Ishida
  • ,
  • Hiroaki Ikeda
  • ,
  • Shigeru Kasahara
  • ,
  • Takasada Shibauchi
  • ,
  • Yuji Matsuda
  • ,
  • Takahito Terashima

391
記述言語
英語
掲載種別
研究論文(国際会議プロシーディングス)
DOI
10.1088/1742-6596/391/1/012127
出版者・発行元
IOP PUBLISHING LTD

P-31-NMR measurements were performed in the iron pnictides BaFe2(As1-xPx)(2) for 0.07 <= x <= 0.64 in order to investigate evolution of electronic state with isovalent substitution. In general, the spin part of the Knight shift K-spin and (T1T)(-1/2) are proportional to the quasiparticle density of states at the Fermi level N(E-F) at high temperature where the Korringa relation holds. We found that K-spin and (T1T)-(1/2) are almost unaffected by the P-substitution, indicating that N (E-F) is nearly constant. These results are quantitatively consistent with our band calculation. We claim that the slight changes of N(E-F) by P-substitution in BaFe2(As1-xPx)(2) is not enough to explain the T-c variation ranging from 30 K to 0 K, and thus suggest that antiferromagnetic correlations related to the quantum critical character are essential for the high T-c superconductivity.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1088/1742-6596/391/1/012127
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000314761400127&DestApp=WOS_CPL
ID情報
  • DOI : 10.1088/1742-6596/391/1/012127
  • ISSN : 1742-6588
  • Web of Science ID : WOS:000314761400127

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