PIRSA:08040032 Conference

DOI10.48660/08040032

Conference/School: Southwestern Ontario 4-Corner Condensed Matter Symposium - 2008

Luke, G. (2008). Nature of Hidden Order in URu2Si2. Perimeter Institute. https://pirsa.org/08040032

Luke, Graeme. Nature of Hidden Order in URu2Si2. Perimeter Institute, Apr. 24, 2008, https://pirsa.org/08040032 

@misc{ pirsa_PIRSA:08040032,
  doi = {10.48660/08040032},
  url = {https://pirsa.org/08040032},
  author = {Luke, Graeme},
  keywords = {},
  language = {en},
  title = {Nature of Hidden Order in URu2Si2},
  publisher = {Perimeter Institute},
  year = {2008},
  month = {apr},
  note = {PIRSA:08040032 see, \url{https://pirsa.org}}
}

Abstract

URu2Si2 is a moderate heavy fermion system which undergoes two transitions with decreasing temperature. The lower transition (1.5K) is to a possibly unconventional superconducting state, whereas the nature of the upper transition (17.5K) is poorly understood. Large lambda-like anomalies are seen in specific heat, along with strong signatures in other transport measurements such as resistivity and magnetic susceptibility. Neutron diffraction measurements only detect a very small ordered moment (0.03 μB), which is too small to give such large bulk signatures. This has prompted theorists to propose various exotic mechanisms to explain this so-called hidden order. I will review our group\'s efforts to understand this system, including our results on non-linear susceptibility and muon spin relaxation under hydrostatic pressure, as well as inelastic neutron scattering studies of this system.

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