論文

査読有り
2020年5月

Horizontal Line Nodes in Sr2RuO4 Proved by Spin Resonance

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN
  • Kazuki Iida
  • ,
  • Maiko Kofu
  • ,
  • Katsuhiro Suzuki
  • ,
  • Naoki Murai
  • ,
  • Seiko Ohira-Kawamura
  • ,
  • Ryoichi Kajimoto
  • ,
  • Yasuhiro Inamura
  • ,
  • Motoyuki Ishikado
  • ,
  • Shunsuke Hasegawa
  • ,
  • Takatsugu Masuda
  • ,
  • Yoshiyuki Yoshida
  • ,
  • Kazuhisa Kakurai
  • ,
  • Kazushige Machida
  • ,
  • Seunghun Lee

89
5
開始ページ
053702
終了ページ
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.7566/JPSJ.89.053702
出版者・発行元
PHYSICAL SOC JAPAN

We investigated the low-energy incommensurate (IC) magnetic fluctuations in Sr2RuO4 by the high-resolution inelastic neutron scattering measurements and random phase approximation (RPA) calculations. We observed a spin resonance with energy of h omega(res) = 0.56meV centered at a characteristic wavevector Q(res) = o0:3; 0:3; 0:5THORN. The resonance energy corresponds well to the superconducting gap 2 Delta = 0.56meV estimated by the tunneling spectroscopy. The spin resonance shows the L modulation with a maximum at around L = 0.5. The L modulated intensity of the spin resonance and our RPA calculations indicate that the superconducting gaps regarding the quasi-one-dimensional alpha and beta sheets at the Fermi surfaces have the horizontal line nodes. These results may set a strong constraint on the pairing symmetry of Sr2RuO4. We also discuss the implications on possible superconducting order parameters.

Web of Science ® 被引用回数 : 2

リンク情報
DOI
https://doi.org/10.7566/JPSJ.89.053702
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000530838900020&DestApp=WOS_CPL

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