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Itinerant U 5$$f$$ nature in antiferromagnet U(Ru$$_{0.97}$$Rh$$_{0.03}$$)$$_{2}$$Si$$_{2}$$; Soft X-ray angle-resolved photoemission spectroscopy

Kawasaki, Ikuto ; Fujimori, Shinichi  ; Okane, Tetsuo ; Yasui, Akira; Saito, Yuji ; Yamagami, Hiroshi*; Haga, Yoshinori ; Yamamoto, Etsuji ; Onuki, Yoshichika*

We have carried out soft X-ray angle-resolved photoemission spectroscopy experiments on U(Ru$$_{0.97}$$Rh$$_{0.03}$$)$$_{2}$$Si$$_{2}$$, which shows antiferromagnetic (AFM) ordering at low temperatures. We have revealed that U 5$$f$$ 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 5$$f$$ electrons. The observed band dispersion and Fermi surface are nearly identical to those of URu$$_{2}$$Si$$_{2}$$. Therefore, the AFM ordering vector $$Q$$ = (1,0,0) can be a possible ordering vector of the hidden order phase in URu$$_{2}$$Si$$_{2}$$.

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Category:Physics, Multidisciplinary

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