Hidden-orders of uranium compounds
Hisatomo Harima
SciPost Phys. Proc. 11, 006 (2023) · published 5 June 2023
- doi: 10.21468/SciPostPhysProc.11.006
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Proceedings event
International Conference on Strongly Correlated Electron Systems
Abstract
Hidden order is often discussed in strongly correlated electron systems. In many cases, it shows no magnetic responses, so that the order parameter is electric, but accompanies few lattice distortion. In the Jahn-Teller cases, the ordered state gains its energy by changing inter-site mixing strengths, leading a larger structural distortion with lowering symmetry. On the contrary, in strongly correlated electron systems, the strong intra-site Coulomb energy causes the the symmetry lowering. It is not necessary to bring the lattice distortion for lowering local site symmetry. In fact, lower symmetry of electronic state than the symmetry of the crystal structure can be found for UTe$_2$, UGe$_2$ similarly for URu$_2$Si$_2$.