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

doi:10.1103/PhysRevLett.117.157201

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

RST/Fundamental Aspects of Materials and Energy

Research output: Contribution to journal › Article › Scientific › peer-review

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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 language	English
Article number	157201
Number of pages	6
Journal	Physical Review Letters
Volume	117
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.117.157201
Publication status	Published - 5 Oct 2016

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PhysRevLett.117.157201Final published version, 457 KBLicence: CC BY

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AU - Chandra, Premala

AU - Coleman, Piers

AU - Ramirez, Arthur P.

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AB - 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.

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

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