Symmetry and Correlations Underlying Hidden Order in URu2Si2

Published

January 26, 2015

Author(s)

Nicholas P. Butch, Michael E. Manley, Jason R. Jeffries, Marc Janoschek, Kevin Huang, M. Brian Maple, Ayman H. Said, Bogdan M. Leu, Jeffrey W. Lynn

Abstract

The organization of correlated electrons in the Hidden Order (HO) phase of intermetallic URu₂Si₂ is a longstanding mystery. In this work, we study the symmetry by mapping the lattice and magnetic excitations via inelastic neutron and x-ray scattering measurements in the NO and high-temperature paramagnetic phases. The HO phase emerges from a highly-directionally correlated paramagnetic phase that gives rise to anisotropic bulk properties. However, at all temperatures the excitations respect the zone edges and symmetries of the body-centered tetragonal paramagnetic phase, showing no signs of reduced lattice symmetry even in the HO phase. Moreover, the magnetic excitations trace the experimentally determined Fermi surface, and their evolution with temperature marks them as a direct signature of itinerant correlations. At the HO phase transition, the opening of energy gaps in the magnetic excitations reflects a change in the hybridization of the many-body correlated state due to an order parameter that preserves the lattice symmetry.

Citation

Physical Review B

Volume

91

Issue

3

Pub Type

Journals

Download Paper

Local Download

Keywords

Condensed Matter Physics, Strongly Correlated Materials, Magnetism

Citation

Butch, N. , , M. , , J. , Janoschek, M. , Huang, K. , , M. , , A. , , B. and Lynn, J. (2015), Symmetry and Correlations Underlying Hidden Order in URu₂Si₂, Physical Review B, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=916277 (Accessed April 25, 2024)