Ground state of a mobile vacancy in a quantum antiferromagnet: Small-cluster study
- 1 April 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 41 (10) , 6715-6723
- https://doi.org/10.1103/physrevb.41.6715
Abstract
The ground state of a mobile vacancy in a square-lattice spin-1/2 Heisenberg antiferromagnet described by the t-J Hamiltonian is investigated numerically for an 18-site cluster. The ground state has spin 1/2, and the bottom of the vacancy band is at momentum k=(±π/2,±π/2), for t/JKeywords
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