Emergence of nematic paramagnet via quantum order-by-disorder and pseudo-Goldstone modes in Kitaev magnets

The authors investigate the K00exΓ00exΓ^' model in a magnetic field along $[111]$. Quantum order-by-disorder gives rise to a nematic paramagnetic phase, that breaks lattice-rotational symmetry spontaneously and exhibits a characteristic pseudo-Goldstone mode.