Translational Symmetry Breaking and Gapping of Heavy-Quasiparticle Pocket in URu 2 Si 2

Rikiya Yoshida, Koji Tsubota, Toshihiko Ishiga, Masanori Sunagawa, Jyunki Sonoyama, Dai Aoki, Jacques Flouquet, Takanori Wakita, Yuji Muraoka, Takayoshi Yokoya

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14 Citations (Scopus)

Abstract

URu 2 Si 2 is a uranium compound that exhibits a so-called 'hidden-order' transition at ∼17.5â€...K. However, the order parameter of this second-order transition as well as many of its microscopic properties remain unclarified despite considerable research. One of the key questions in this regard concerns the type of spontaneous symmetry breaking occurring at the transition; although rotational symmetry breaking has been detected, it is not clear whether another type of symmetry breaking also occurs. Another key question concerns the property of Fermi-surface gapping in the momentum space. Here we address these key questions by a momentum-dependent observation of electronic states at the transition employing ultrahigh-resolution three-dimensional angle-resolved photoemission spectroscopy. Our results provide compelling evidence of the spontaneous breaking of the lattice's translational symmetry and particle-hole asymmetric gapping of a heavy quasiparticle pocket at the transition.

Original languageEnglish
Article number2750
JournalScientific Reports
Volume3
DOIs
Publication statusPublished - 2013

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Uranium Compounds
Photoelectron Spectroscopy
Surface Properties
Observation
Research

ASJC Scopus subject areas

  • General

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Translational Symmetry Breaking and Gapping of Heavy-Quasiparticle Pocket in URu 2 Si 2. / Yoshida, Rikiya; Tsubota, Koji; Ishiga, Toshihiko; Sunagawa, Masanori; Sonoyama, Jyunki; Aoki, Dai; Flouquet, Jacques; Wakita, Takanori; Muraoka, Yuji; Yokoya, Takayoshi.

In: Scientific Reports, Vol. 3, 2750, 2013.

Research output: Contribution to journalArticle

Yoshida, Rikiya ; Tsubota, Koji ; Ishiga, Toshihiko ; Sunagawa, Masanori ; Sonoyama, Jyunki ; Aoki, Dai ; Flouquet, Jacques ; Wakita, Takanori ; Muraoka, Yuji ; Yokoya, Takayoshi. / Translational Symmetry Breaking and Gapping of Heavy-Quasiparticle Pocket in URu 2 Si 2. In: Scientific Reports. 2013 ; Vol. 3.
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AU - Yoshida, Rikiya

AU - Tsubota, Koji

AU - Ishiga, Toshihiko

AU - Sunagawa, Masanori

AU - Sonoyama, Jyunki

AU - Aoki, Dai

AU - Flouquet, Jacques

AU - Wakita, Takanori

AU - Muraoka, Yuji

AU - Yokoya, Takayoshi

PY - 2013

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