Propagating S=1/2 particles in S=1 Haldane gap systems

Preprint

23 February 1995

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9502085

Abstract

Inspired by the recent experiments on Y$_{2-x}$Ca$_x$BaNiO$_5$, (J. F. DiTusa {\it et al.}, Phys. Rev. Lett. 73, 1857 (1994)), we discuss the dispersion relation of the $s$=1/2 particles in the $s$=1 Heisenberg and VBS model in the limit of small hopping amplitudes. The effective $s$=1/2 edge spins mix with the spin of the impurity resulting in one four--fold and two two--fold degenarate bands. We briefly discuss the interaction between the $s$=1/2 particles arising from the background.

Keywords

GAP SYSTEMS INSPIRED
HALDANE GAP SYSTEMS
DISPERSION RELATION
RECENT EXPERIMENTS
SYSTEMS INSPIRED
PROPAGATING
PARTICLES

All Related Versions

Version 1, 1995-02-22, ArXiv
Version 2, 1995-02-23, ArXiv
Published version: Physical Review B, 52 (2), R715.

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