Quantum and classical spins on the spatially distorted kagomé lattice: Applications to volborthiteCu3V2O7(OH)2∙2H2O

  title={Quantum and classical spins on the spatially distorted kagom{\'e} lattice: Applications to volborthiteCu3V2O7(OH)2∙2H2O},
  author={Fa Wang and Ashvin Vishwanath and Yong Baek Kim},
  journal={Physical Review B},
In Volborthite, spin-1/2 moments form a distorted Kagom\'e lattice, of corner sharing isosceles triangles with exchange constants $J$ on two bonds and $J'$ on the third bond. We study the properties of such spin systems, and show that despite the distortion, the lattice retains a great deal of frustration. Although sub-extensive, the classical ground state degeneracy remains very large, growing exponentially with the system perimeter. We consider degeneracy lifting by thermal and quantum… 

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