• DOI:10.1103/PhysRevB.104.035103
• Corpus ID: 232170176

Phonon Hall viscosity from phonon-spinon interactions

@article{Zhang2021PhononHV,
  title={Phonon Hall viscosity from phonon-spinon interactions},
  author={Yunchao Zhang and Yanting Teng and Rhine Samajdar and Subir Sachdev and Mathias S. Scheurer},
  journal={Physical Review B},
  year={2021}
}

• Yunchao Zhang, Y. Teng, +2 authors M. Scheurer
• Published 9 March 2021
• Physics
• Physical Review B

Motivated by experimental observations, Samajdar et al. [Nature Physics 15, 1290 (2019)] have proposed that the insulating Néel state in the parent compounds of the cuprates is proximate to a quantum phase transition to a state in which Néel order coexists with semion topological order. We study the manner in which proximity to this transition can make the phonons chiral, by inducing a significant phonon Hall viscosity. We describe the spinon-phonon coupling in a lattice spinon model coupled to a strain field, and also using a general continuum theory constrained only by symmetry. We find a nonanalytic Hall viscosity across the transition, with a divergent second derivative at zero temperature.