Spinon-holon interactions in an anisotropic t-J chain: a comprehensive study

Abstract

We consider a generalization of the one-dimensional t-J model with anisotropic spin-spin interactions. We show that the anisotropy leads to an effective attractive interaction between the spinon and holon excitations, resulting in a localized bound state. Detailed quantitative analytic predictions for the dependence of the binding energy on the anisotropy are presented, and verified by precise numerical simulations. The binding energy is found to interpolate smoothly between a finite value in the t-Jz limit and zero in the isotropic limit, going to zero exponentially in the vicinity of the latter. We identify changes in spinon dispersion as the primary factor for this non-trivial behavior.

12 pages, 13 figures, long story. The short story is cond-mat/0702213. Published version

References in corpus (8)

• Density matrix renormalization group algorithms with a single center site
• Holes in the t-J_z model: a thorough study
• Quantum Phase Diagram of the t-Jz Chain Model
• Theory of hole propagation in one dimensional insulators and superconductors
• Hole motion in the Ising antiferromagnet: an application of the recursion method
• Single hole dynamics in the one dimensional t-J model
• Binding of holons and spinons in the one-dimensional anisotropic t-J model
• Coordinate Representation of the One-Spinon One-Holon Wavefunction and Spinon-Holon Interaction

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• The fate of the spin polaron in the 1D antiferromagnets
• Unidirectional subsystem symmetry in a hole-doped honeycomb-lattice Ising magnet
• Single-hole spectral functions in one-dimensional quantum magnets with different ground states