Electronic Nematicity in URu2Si2 Revisited

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

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Article number257601
JournalPhysical review letters
Volume124
Issue number25
DOIs
Publication statusPublished - 2020 Jun 26

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Wang, L., He, M., Hardy, F., Aoki, D., Willa, K., Flouquet, J., & Meingast, C. (2020). Electronic Nematicity in URu2Si2 Revisited. Physical review letters, 124(25), [257601]. https://doi.org/10.1103/PhysRevLett.124.257601