Itinerant U 5 band states in the layered compound UFeGa observed by soft X-ray angle-resolved photoemission spectroscopy

Fujimori, Shinichi   ; Terai, Kota; Takeda, Yukiharu   ; Okane, Tetsuo  ; Saito, Yuji  ; Muramatsu, Yasuji; Fujimori, Atsushi; Yamagami, Hiroshi*; Tokiwa, Yoshifumi*; Ikeda, Shugo; Matsuda, Tatsuma; Haga, Yoshinori   ; Yamamoto, Etsuji  ; Onuki, Yoshichika

We have performed angle-resolved photoemission spectroscopy (ARPES) experiments on paramagnetic UFeGa using soft X-ray synchrotron radiation (=500 eV) and derived the bulk- and U 5-sensitive electronic structure of UFeGa. Although the agreement between the experimental band strucure and the LDA calculation treating U 5 electrons as beeing itinerant is qualitative, the morphology of the Fermi surface is well explained by the calculation. This result claims that the importance of the electron correlation effect even for the itinerant U 5 compound.