Spin vestigial orders in extended Heisenberg-Kitaev models near hidden SU(2) points: Application to Na${}_2$Co${}_2$TeO${}_6$

Niccolò Francini, Lukas Janssen

The honeycomb magnet Na${}_2$Co${}_2$TeO${}_6$ has recently been argued to realize an approximate hidden SU(2) symmetry that can be understood by means of a duality transformation. Using…