Ribhu Kaul
Duality and Domain Wall Dynamics in CoNb2O6

CoNb2O6 is a beautiful realization of a material with weakly coupled one dimensional easy axis magnetism. In this talk I will discuss how the symmetry of the crystal structure of this material creates rich domain wall dynamics, described by the SSH model of polyacetylene. Theoretical studies of a simple model for the spin-orbit coupled magnetism describes the rich structure of THz spectra and its evolution in a transverse field. Close to a critical point the THz data shows universal behavior and the first direct observation of the celebrated Kramers-Wannier duality in a physical system.