ARPES study of heavy-fermion uranium superconductors

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

Some heavy-fermion uranium compounds exhibit unconventional superconductivity. One of their characteristics is that the superconductivity often coexists with a magnetic ordering. In particular, the coexistence of the ferromagnetic ordering and superconductivity have been found only in uranium compounds. We have studied the electronic structures of heavy-fermion uranium superconductors by the ARPES with the soft X-ray from SPring-8. Recently, we have further developed the three-dimensional (3D) ARPES method, in which all three parameters in ARPES experiments (two detecting angles of photoelectrons and incident photon energy) are scanned, and the complete volume electronic structure of the entire Brillouin zone can be obtained. The result of some heavy Fermion superconductors will be presented.