Origin of the Large Anisotropy in the χ3 Anomaly in URu2Si2

10th International Conference on Materials and Mechanisms of Superconductivity

Chandra, P.^1 ; Coleman, P.^1,2 ; Flint, R.^3

Center for Materials Theory, Department of Physics and Astronomy, Rutgers University, Piscataway, NJ 08854, United States^1

Department of Physics, Royal Holloway, University of London, Egham, Surrey TW20 0EX, United Kingdom^2

Department of Physics, Massachusetts Institute for Technology, 77 Massachusetts Avenue, Cambridge, MA 02139-4307, United States^3

关键词: Angular anisotropy;    Conduction electrons;    Hidden Order;    Large anisotropy;    Nonlinear susceptibilities;    Order parameter;    Quantum oscillations;    Two-component;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/449/1/012026/pdf
DOI  :  10.1088/1742-6596/449/1/012026

来源: IOP

【 摘 要 】

Motivated by recent quantum oscillations experiments on U Ru2Si2, we discuss the microscopic origin of the large anisotropy observed many years ago in the anomaly of the nonlinear susceptibility in this same material. We show that the magnitude of this anomaly emerges naturally from hastatic order, a proposal for hidden order that is a two-component spinor arising from the hybridization of a non-Kramers Γ5 doublet with Kramers conduction electrons. A prediction is made for the angular anisotropy of the nonlinear susceptibility anomaly as a test of this proposed order parameter for U Ru2Si2.