Photoemission study on heavy fermion superconductors

✍ Scribed by Shin-ichi Fujimori; Yuji Saitoh; Tetsuo Okane; Hiroshi Yamagami; Atsushi Fujimori; Kenya Shimada; Hiroshi Namatame; Masaki Taniguchi; Hiroaki Shishido; Dai Aoki; Shugo Ikeda; Yoshinori Haga; Etsuji Yamamoto; Yoshichika Ōnuki

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 136 KB
• Volume: 460-462
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2007.03.027

✦ Synopsis

We have performed angle-resolved photoemission experiments for heavy fermion superconductors CeIrIn 5 and UPd 2 Al 3 . It was found that the Ce 4f electrons in CeIrIn 5 are nearly localized, but the small itinerant component also exists in the ARPES spectra. For UPd 2 Al 3 , on the other hand, the strongly dispersive bands of U 5f origin were observed, suggesting that the U 5f electronic states are dominated by the itinerant character. We have found that these two compounds have very different natures of f-electrons although both of them show the coexistence or competition of the superconductivity and the magnetic ordering.