論文

査読有り
2020年7月

Electronic multipoles and multiplet pairs induced by Pomeranchuk and Cooper instabilities of Bogoliubov Fermi surfaces

PHYSICAL REVIEW B
  • Shun-Ta Tamura
  • ,
  • Shoma Iimura
  • ,
  • Shintaro Hoshino

102
2
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1103/PhysRevB.102.024505
出版者・発行元
AMER PHYSICAL SOC

It was recently pointed out that Fermi surfaces can remain even in superconductors under symmetric spin-orbit interaction and broken time-reversal symmetry. Using the linear response theory, we study the instability of such systems toward ordering, which is an intrinsic property of Fermi surfaces. The ordered states are classified into diagonal and off-diagonal ones, which respectively indicate the Pomeranchuk instability and Cooper pairing not of original electron but of Bogoliubov particles (bogolons). The corresponding order parameters are expanded by multipole moments (diagonal order parameter) and multiplet pair amplitudes (off-diagonal order parameter) of original electrons, which are induced by the internal fields arising from bogolon ordering. While the bogolons' order parameters partially inherit the characters of the original electrons, many order parameter components mix with similar magnitude. Hence, there is no clear-cut distinction for whether the phase transition is diagonal or off-diagonal ordering in terms of the original electrons. These ordering instabilities inside the superconducting states provide insights into superconductors which have the second phase transition below the first transition temperature.

Web of Science ® 被引用回数 : 1

リンク情報
DOI
https://doi.org/10.1103/PhysRevB.102.024505
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000545539000012&DestApp=WOS_CPL

エクスポート
BibTeX RIS