Hole dynamics and effective hole-hole interaction in a quantum antiferromagnet

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Date
1991-04
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Publisher
American Physical Society
Abstract

By the use of an effective Hamiltonian which takes into account the constraint on the motion of holes in a quantum antiferromagnet, the dynamics of holes is investigated. It is found that there is a quasiparticle band whose width is of order J at the bottom of the hole spectrum. The effective hole-hole interaction mediated by spin fluctuations is derived and the attraction between holes in the d-wave channel is obtained. The results suggest that a d-wave-pairing condensation in a quantum antiferromagnet is very possible.

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Keywords
square-lattice antiferromagnet, spin-wave theory, superconductivity, model, physics, condensed matter
Citation
Xu, J. H.; Ting, C. S.; Lee, T. K., "Hole dynamics and effective hole-hole interaction in a quantum antiferromagnet," Phys. Rev. B 43, 8733(R) DOI: http://dx.doi.org/10.1103/PhysRevB.43.8733