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論文

Cyclotron resonance study of quasiparticle mass and scattering rate in the hidden-order and superconducting phases of URu$$_2$$Si$$_2$$

利根川 翔*; 橋本 顕一郎*; 井加田 洸輔*; 鶴原 悠悟*; Lin, Y.-H.*; 宍戸 寛明*; 芳賀 芳範; 松田 達磨; 山本 悦嗣; 大貫 惇睦; et al.

Physical Review B, 88(24), p.245131_1 - 245131_13, 2013/12

 被引用回数:12 パーセンタイル:53.54(Materials Science, Multidisciplinary)

Detailed analyses of the cyclotron resonance lines in a uranium compound URu$$_2$$Si$$_2$$ are reported. The analyses of the resonance profiles reveals that the heavier branch of the split line has a larger scattering rate, providing evidence for the existence of hot-spot along the [110] direction. The result is consistent with the broken fourfold symmetry in the hidden-order phase.

論文

Cyclotron resonance in the hidden-order phase of URu$$_2$$Si$$_2$$

利根川 翔*; 橋本 顕一郎*; 井加田 洸輔*; Lin, Y.-H.*; 宍戸 寛明*; 芳賀 芳範; 松田 達磨; 山本 悦嗣; 大貫 惇睦; 池田 浩章*; et al.

Physical Review Letters, 109(3), p.036401_1 - 036401_5, 2012/07

 被引用回数:51 パーセンタイル:88.95(Physics, Multidisciplinary)

First observation of cyclotron resonance in the hidden-order phase of ultra clean URu$$_2$$Si$$_2$$ is reported. An anomalous splitting of the sharpest resonance line under in-plane magnetic field rotation was found. This is most naturally explained by the domain formation, which breaks the fourfold rotational symmetry of the underlying tetragonal lattice. The result is consistent with the "nematic" Fermi liquid state, in which itinerant electrons have unidirectional correlations.

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