Electronic structures of U (=Al, Ga, and In) studied by photoelectron spectroscopy

光電子分光によるU (=Al, Ga, and In)の電子状態

藤森 伸一   ; 小畠 雅明 ; 竹田 幸治   ; 岡根 哲夫  ; 斎藤 祐児 ; 藤森 淳; 山上 浩志; 芳賀 芳範   ; 山本 悦嗣  ; 大貫 惇睦*

Fujimori, Shinichi; Kobata, Masaaki; Takeda, Yukiharu; Okane, Tetsuo; Saito, Yuji; Fujimori, Atsushi; Yamagami, Hiroshi; Haga, Yoshinori; Yamamoto, Etsuji; Onuki, Yoshichika*

The electronic structures of U (=Al, Ga, and In) were studied by photoelectron spectroscopy to understand the relationship between their electronic structure and magnetic properties. The band structures and Fermi surfaces of UAl and UGa were revealed experimentally by angle-resolved photoelectron spectroscopy (ARPES), and they were compared with the result of band structure calculations. The topologies of the Fermi surfaces and the band structures of UAl and UGa were explained reasonably well by the calculation, although bands near the Fermi level () were renormalized owing to the finite electron correlation effect. The topologies of the Fermi surfaces of UAl and UGa are very similar to each other, except for some minor differences. Such minor differences in their Fermi surface or electron correlation effect might take an essential role in their magnetism.