Spinon-holon interactions in an anisotropic tJ chain: A comprehensive study

Jurij Šmakov, A. L. Chernyshev, and Steven R. White
Phys. Rev. B 76, 115106 – Published 10 September 2007

Abstract

We consider a generalization of the one-dimensional tJ 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 are verified by precise numerical simulations. The binding energy is found to interpolate smoothly between a finite value in the tJz 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 nontrivial behavior.

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  • Received 22 May 2007

DOI:https://doi.org/10.1103/PhysRevB.76.115106

©2007 American Physical Society

Authors & Affiliations

Jurij Šmakov, A. L. Chernyshev, and Steven R. White

  • Department of Physics and Astronomy, University of California Irvine, Irvine, California 92697, USA

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Issue

Vol. 76, Iss. 11 — 15 September 2007

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