Itinerant U 5f Nature in Antiferromagnet U(Ru0.97Rh0.03)(2)Si-2: Soft X-ray Angle-Resolved Photoemission Spectroscopy

作者：Kawasaki Ikuto^*; Fujimori Shin ichi; Okane Tetsuo; Yasui Akira; Saitoh Yuji; Yamagami Hiroshi; Haga Yoshinori; Yamamoto Etsuji; Onuki Yoshichika

来源：Journal of the Physical Society of Japan, 2011, 80(12): 124710.

DOI：10.1143/JPSJ.80.124710

• angle-resolved photoemission
• URu2Si2
• heavy fermion
• hidden order
• antiferromagnetism
• band structure
• Fermi surface

We have carried out soft X-ray angle-resolved photoemission spectroscopy experiments on U(Ru0.97Rh0.03)(2)Si-2, which shows antiferromagnetic (AFM) ordering at low temperatures. We have revealed that U 5f electrons contribute to the formation of the energy band as well as Fermi surface. This suggests that the AFM ordering is caused by a spin density wave of itinerant U 5f electrons. The observed band dispersion and Fermi surface are nearly identical to those of URu2Si2. Therefore, the AFM ordering vector Q = (1, 0, 0) can be a possible ordering vector of the hidden order phase in URu2Si2.

• 出版日期2011-12