Holons on a meandering stripe

Details Holons on a meandering stripe Holons on a meandering stripe

1999-07-29

arxiv.org/abs/cond-mat/9907472v2

Physics

Condensed Matter

Strongly Correlated Electrons

REVTeX, 4 two-column pages, 4 eps figures with epsf.sty

Scientific paper

To study a possible effect of transverse fluctuations of a stripe in a 2D antiferromagnet on its charge dynamics, we identify elementary excitations of a weakly doped domain wall in the Hubbard model. Hartree-Fock numerics and analysis of fermion zero modes suggest that for U>=3t charged excitations are mobile holons, Q=1, S=0. Each holon resides on a kink in the position of the domain wall. We construct a simple model in which transverse stripe dynamics is induced solely by motion of the holons. In the absence of spin excitations (spinons, Q=0, S=1/2), stripe fluctuations DO NOT suppress a tendency to form a global charge-density order.

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