Abstract
The internal structure of hole quasi-particles formed in Ising Antiferromagnets remains intact in the presence of Heisenberg spin dynamics when the superexchange and hole hopping integral are not too dissimilar. We examine the modification of the internal structure of the wave-function as a result of the delocalisation arising from the spin dynamics. In particular we determine the dispersion and effective mass of the quasi-particle states. We also examine the short wavelength spin distortion induced by the hole motion and point out the anisotropy present at finite momentum.
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