Exact diagonalization study of the anisotropic triangular lattice Heisenberg model using twisted boundary conditions

The spin-1/2 anisotropic triangular model, which is believed to describe the materials Cs2CuCl4 and Cs2CuBr4, among others, is dominated by incommensurate spiral physics and is thus extremely resistant to numerical analysis on small system sizes. In this paper, we use twisted boundary conditions and exact diagonalization techniques to study the ground state of this model as a function of exchange parameter strength. With these boundary …