論文

査読有り
2014年2月

Relationship between Superconductivity and Antiferromagnetism in LaFe(As1-xPx)O Revealed by P-31-NMR

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Shunsaku Kitagawa
  • ,
  • Tetsuya Iye
  • ,
  • Yusuke Nakai
  • ,
  • Kenji Ishida
  • ,
  • Cao Wang
  • ,
  • Guang-Han Cao
  • ,
  • Zhu-An Xu

83
2
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/JPSJ.83.023707
出版者・発行元
PHYSICAL SOC JAPAN

We performed P-31-NMR measurements on LaFe(As1-xPx)O to investigate the relationship between antiferromagnetism and superconductivity. The antiferromagnetic (AFM) ordering temperature T-N and the moment mu(ord) are continuously suppressed with increasing P content x and disappear at x = 0.3 where bulk superconductivity appears. At this superconducting x = 0.3, quantum critical AFM fluctuations are observed, indicative of the intimate relationship between superconductivity and low-energy AFM fluctuations associated with the quantum-critical point in LaFe(As1-xPx)O. The relationship is similar to those observed in other isovalent-substitution systems, e.g., BaFe2(As1-xPx)(2) and SrFe2(As1-xPx)(2), with the '' 122 '' structure. Moreover, the AFM order reappears with further P substitution (x > 0.4). The variation of the ground state with respect to the P substitution is considered to be linked to the change in the band character of Fe-3d orbitals around the Fermi level.

Web of Science ® 被引用回数 : 20

リンク情報
DOI
https://doi.org/10.7566/JPSJ.83.023707
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000331226300008&DestApp=WOS_CPL
ID情報
  • DOI : 10.7566/JPSJ.83.023707
  • ISSN : 0031-9015
  • Web of Science ID : WOS:000331226300008

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