Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets
arXiv:cond-mat/0310597 · doi:10.1103/PhysRevLett.92.236404
Abstract
The dynamics of a mobile hole in two-dimensional frustrated quantum magnets is investigated by exact diagonalization techniques. Our results provide evidence for spin-charge separation upon doping the kagome lattice, a prototype of a spin liquid. In contrast, in the checkerboard lattice, a symmetry broken Valence Bond Crystal, a small quasi-particle peak is seen for some crystal momenta, a finding interpreted as a restoration of weak holon-spinon confinement.
4 pages, 6 figures