2020/04/15 by Shun-Ta Tamura, Shoma Iimura, Shintaro Hoshino · 22 citations
Physics and Astronomy · #Advanced Condensed Matter Physics #Condensed matter physics #Cooper pair #Diagonal #Electron #Electron pair #Fermi Gamma-ray Space Telescope #Fermi surface #Instability #Multiplet #Multipole expansion #Pairing #Physics #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Quantum mechanics #Superconductivity #cond-mat.str-el #cond-mat.supr-con
paper · pdf · doi:10.1103/physrevb.102.024505
published in Physical review. B./Physical review. B 102(2) (American Physical Society) · 13 pages, 5 figures
arxiv created 2020/04/15 · openalex publication_date 2020/07/06 · arxiv updated 2020/07/09 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
It was recently pointed out that Fermi surfaces can survive even in superconductors. Here, the authors study the instability of such systems toward electronic ordering. The ordered states are classified into diagonal and off-diagonal ones, which, respectively, indicate the Pomeranchuk instability and Cooper pairing not of original electrons but of Bogoliubov particles (bogolons). The corresponding order parameters are expanded by multipole moments and multiplet pair amplitudes of original electrons. These results provide insights into superconductors with multiple phase transitions.