Thermodynamic Measurement of Angular Anisotropy at the Hidden Order Transition of URu2Si2

Jennifer Trinh, Ekkes Brück, Theo Siegrist, Rebecca Flint, Premala Chandra, Piers Coleman, Arthur P. Ramirez

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)
14 Downloads (Pure)

Abstract

The heavy fermion compound URu2Si2 continues to attract great interest due to the unidentified hidden order it develops below 17.5 K. The unique Ising character of the spin fluctuations and low-temperature quasiparticles is well established. We present detailed measurements of the angular anisotropy of the nonlinear magnetization that reveal a cos4θ Ising anisotropy both at and above the ordering transition. With Landau theory, we show this implies a strongly Ising character of the itinerant hidden order parameter.

Original languageEnglish
Article number157201
Number of pages6
JournalPhysical Review Letters
Volume117
Issue number15
DOIs
Publication statusPublished - 5 Oct 2016

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