Split Fermi surface properties in Ulmannite NiSbS and PdBiSe with the cubic chiral crystal structure

カイラル立方晶構造を持つウルマナイトNiSb及びPdBiSeのフェルミ面分裂の特性

垣花 将司*; 照屋 淳志*; 西村 憲吾*; 仲村 愛*; 竹内 徹也*; 芳賀 芳範   ; 播磨 尚朝*; 辺土 正人*; 仲間 隆男*; 大貫 惇睦

Kakihana, Masashi*; Teruya, Atsushi*; Nishimura, Kengo*; Nakamura, Ai*; Takeuchi, Tetsuya*; Haga, Yoshinori; Harima, Hisatomo*; Hedo, Masato*; Nakama, Takao*; Onuki, Yoshichika

Fermi surface properties of illuminate NiSbS and PbBiSe have been clarified by de Haas-van Alphen effect, resistivity and specific heat measurements. Fermi surfaces were found to split into two, reflecting the non-centrosymmetric crystal structure. The splitting energies have been estimated experimentally. Those are originated from spin-orbit interactions.