Spin-Charge Separation in Two-dimensional Frustrated Quantum Magnets

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

References in corpus (16)

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Cited by in corpus (31)

• Parton theory of ARPES spectra in anti-ferromagnetic Mott insulators
• Detecting spontaneous symmetry breaking in finite-size spectra of frustrated quantum antiferromagnets
• Holon Wigner Crystal in a Lightly Doped Kagome Quantum Spin Liquid
• Hole Spectral Function of a Chiral Spin Liquid in the Triangular Lattice Hubbard Model
• Phase diagram of the 1/3-filled extended Hubbard model on the Kagome lattice
• Spinon deconfinement in doped frustrated quantum antiferromagnets
• Hole propagation in the Kitaev-Heisenberg model: From quasiparticles in quantum Neel states to non-Fermi liquid in the Kitaev phase
• Spectral functions and optical conductivity of spinless fermions on a checkerboard lattice
• Bond order wave instabilities in doped frustrated antiferromagnets: "Valence bond solids" at fractional filling
• Enhanced pairing in doped quantum magnets with frustrating hole motion
• Antiferromagnetism, $f$-wave and chiral $p$-wave superconductivity in a Kagome lattice with possible application to $s{d}^2$-graphenes
• Dimers on the Triangular Kagome Lattice
• Systematic Analysis of Frustration Effects in Anisotropic Checkerboard Lattice Hubbard Model
• Doping on the kagome lattice: A variational Monte-Carlo study of the $t-J$ model
• Plaquette bond order wave in the quarter-filled extended Hubbard model on the checkerboard lattice
• Quantum half-orphans in kagome antiferromagnets
• Unconventional Superconducting Symmetry in a Checkerboard Antiferromagnet
• Anomalous spin-charge separation in a driven Hubbard system
• Exotic Mott phases of the extended t--J model on the checkerboard lattice at commensurate densities
• Spin polaron in the J1-J2 Heisenberg model
• Single-hole spectra of Kitaev spin liquids: from dynamical Nagaoka ferromagnetism to spin-hole fractionalization
• Single-particle spectral function of fractional quantum anomalous Hall states
• Magnetic correlations around the Mott transition in the Kagomé lattice Hubbard model
• Effects of semiclassical spiral fluctuations on hole dynamics
• The fate of pairing and spin-charge separation in the presence of long-range antiferromagnetism
• Probing a quantum spin liquid with equilibrium and nonequilibrium hole dynamics
• Spin-charge bound states and emerging fermions in a quantum spin liquid
• Hole dynamics in canted antiferromagnets
• The fate of the spin polaron in the 1D antiferromagnets
• Exotic phenomena in doped quantum magnets
• Fractionally charged excitations on frustrated lattices