Sprecher
Beschreibung
Motivated by recent thermal hall measurements in a putative quantum spin liquid state(alpha-RuCl3), we explore Z_2 gauge theory where vison excitations induce thermal hall currents. We classify the symmetry-enriched Z2 topological(SET) order with translations. Among the 9 SET classes, we identify classes where a chern band for visons is forbidden. Applied to spin-1/2 systems with a slave-particle construction, we construct vison models which describe fully frustrated Ising paramagnet (FFIM), on square, honeycomb and Kagome lattices, that yield a Chern band and could contribute to thermal hall effects. Last, a Z2 gauge model with background visons, that aligns with the phenomenology of alpha-RuCl3 is demonstrated to yield thermal hall conductivity from visons similar to measured.
