Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets

Details Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets

2003-10-24

arxiv.org/abs/cond-mat/0310597v2

Phys. Rev. Lett. 92, 236404 (2004)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 6 figures

Scientific paper

10.1103/PhysRevLett.92.236404

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.

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