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論文

Observation of two fine structures related to the hidden order in the spectral functions of URu$$_2$$Si$$_2$$

吉田 力矢*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Malaeb, W.*; Shin, S.*; 村岡 祐治*; 横谷 尚睦*

Physical Review B, 85(24), p.241102_1 - 241102_4, 2012/06

 被引用回数:18 パーセンタイル:59.58(Materials Science, Multidisciplinary)

The spectral functions of URu$$_2$$Si$$_2$$ in the hidden-order state are studied by means of ultrahigh-resolution angle-resolved photoemission spectroscopy. High signal-to-noise ratio data uncover the existence of two anomalous fine structures. The structures can be explained by neither ordinary bands nor the development of a hybridization of two states. As a possible origin, we suggest the existence of electron-mode coupling in the ordered state.

論文

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

吉田 力矢*; 中村 祥明*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Shin, S.*; 平井 正明*; 村岡 祐治*; et al.

Journal of Physics; Conference Series, 273, p.012021_1 - 012021_4, 2011/02

 被引用回数:1 パーセンタイル:34.07

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.

論文

Signature of hidden order and evidence for periodicity modification in URu$$_2$$Si$$_2$$

吉田 力矢*; 中村 祥明*; 福井 仁紀*; 芳賀 芳範; 山本 悦嗣; 大貫 惇睦; 大川 万里生*; Shin, S.*; 平井 正明*; 村岡 祐治*; et al.

Physical Review B, 82(20), p.205108_1 - 205108_6, 2010/11

 被引用回数:61 パーセンタイル:88.17(Materials Science, Multidisciplinary)

The detail of electronic structures near the Fermi level in URu$$_2$$Si$$_2$$ has been investigated employing state-of-art laser angle-resolved photoemission spectroscopy. The observation of a narrow dispersive band near the Fermi level in the ordered state as well as its absence in RH-substituted sample strongly suggest that the emergence of the narrow band is a clear signature of the hidden-order transition.

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