Electronic Nematicity in URu2Si2 Revisited

Liran Wang, Mingquan He, Frédéric Hardy, Dai Aoki, Kristin Willa, Jacques Flouquet, Christoph Meingast

研究成果: Article査読

6 被引用数 (Scopus)

抄録

The nature of the hidden-order (HO) state in URu2Si2 remains one of the major unsolved issues in heavy-fermion physics. Recently, torque magnetometry, x-ray diffraction, and elastoresistivity data have suggested that the HO phase transition at THO≈ 17.5 K is driven by electronic nematic effects. Here, we search for thermodynamic signatures of this purported structural instability using anisotropic thermal expansion, Young's modulus, elastoresistivity, and specific-heat measurements. In contrast to the published results, we find no evidence of a rotational symmetry breaking in any of our data. Interestingly, our elastoresistivity measurements, which are in full agreement with published results, exhibit a Curie-Weiss divergence, which we however attribute to a volume and not to a symmetry-breaking effect. Finally, clear evidence for thermal fluctuations is observed in our heat-capacity data, from which we estimate the HO correlation length.

本文言語English
論文番号257601
ジャーナルPhysical review letters
124
25
DOI
出版ステータスPublished - 2020 6月 26

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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