Hidden Orbital Order in $URu_{2}Si_{2}$

P. Chandra; P. Coleman; J. A. Mydosh; V. Tripathi

doi:10.1038/nature00795

paper

Hidden Orbital Order in $U R u_{2} S i_{2}$

arXiv:cond-mat/0205003 · doi:10.1038/nature00795

Abstract

When matter is cooled from high temperatures, collective instabilities develop amongst its constituent particles that lead to new kinds of order. An anomaly in the specific heat is a classic signature of this phenomenon. Usually the associated order is easily identified, but sometimes its nature remains elusive. The heavy fermion metal $U R u_{2} S i_{2}$ is one such example, where the order responsible for the sharp specific heat anomaly at $T_{0} = 17 K$ has remained unidentified despite more than seventeen years of effort. In $U R u_{2} S i_{2}$ , the coexistence of large electron-electron repulsion and antiferromagnetic fluctuations in $U R u_{2} S i_{2}$ leads to an almost incompressible heavy electron fluid, where anisotropically paired quasiparticle states are energetically favored. In this paper we use these insights to develop a detailed proposal for the hidden order in $U R u_{2} S i_{2}$ . We show that incommensurate orbital antiferromagnetism, associated with circulating currents between the uranium ions, can account for the local fields and entropy loss observed at the $17 K$ transition; furthermore we make detailed predictions for neutron scattering measurements.

Hidden Orbital Order in $U R u_{2} S i_{2}$

Abstract

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Hidden Orbital Order in URu2​Si2​

Abstract

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Cited by in corpus (133)

Hidden Orbital Order in $U R u_{2} S i_{2}$