We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Hastatic order in the heavy-fermion compound URu<sub>2</sub>Si<sub>2</sub>.
- Authors
Chandra, Premala; Coleman, Piers; Flint, Rebecca
- Abstract
The development of collective long-range order by means of phase transitions occurs by the spontaneous breaking of fundamental symmetries. Magnetism is a consequence of broken time-reversal symmetry, whereas superfluidity results from broken gauge invariance. The broken symmetry that develops below 17.5?kelvin in the heavy-fermion compound URu2Si2 has long eluded such identification. Here we show that the recent observation of Ising quasiparticles in URu2Si2 results from a spinor order parameter that breaks double time-reversal symmetry, mixing states of integer and half-integer spin. Such 'hastatic' order hybridizes uranium-atom conduction electrons with Ising 5f2 states to produce Ising quasiparticles; it accounts for the large entropy of condensation and the magnetic anomaly observed in torque magnetometry. Hastatic order predicts a tiny transverse moment in the conduction-electron 'sea', a colossal Ising anisotropy in the nonlinear susceptibility anomaly and a resonant, energy-dependent nematicity in the tunnelling density of states.
- Publication
Nature, 2013, Vol 493, Issue 7434, p621
- ISSN
0028-0836
- Publication type
Academic Journal
- DOI
10.1038/nature11820