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Electronic structure of U(Ru$$_{1-x}$$Rh$$_{x}$$)$$_2$$Si$$_2$$ studied by laser angle-resolved photoemission spectroscopy

Yoshida, Rikiya*; Nakamura, Yoshiaki*; Fukui, Masaki*; Haga, Yoshinori ; Yamamoto, Etsuji ; Onuki, Yoshichika; Okawa, Mario*; Shin, S.*; Hirai, Masaaki*; Muraoka, Yuji*; Yokoya, Takayoshi*

Electronic structures of U(Ru$$_{1-x}$$Rh$$_x$$)$$_2$$Si$$_2$$ is studied employing ultrahigh-resolution laser angle-resolved photoemission spectroscopy. A hole-like dispersive feature, which presumably has Rh $$d$$-band character, was observed.However, although a heavy quasiparticle band appears in the hidden-order state of URu$$_2$$Si$$_2$$ ($$x$$ = 0), it was not observed for $$x$$ = 0.03 over the temperature range studied.



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