Single-hole state in half-filled 2D Hubbard model |
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Authors: | C F Lo |
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Institution: | (1) Department of Physics, Florida State University, 32306-3016 Tallahassee, FL, USA |
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Abstract: | Summary We have investigated the ground state of a single hole in the half-filled Hubbard model on a 2D square lattice using the coupled-cluster
method. In particular we obtained an analytical expression of the hole energy dispersion function ɛ(k) which is consistent with earlier studies on thet-J model in the strong-coupling limit. An appreciable discrepancy on the hole energy bandwidth is, however, observed between
the Hubbard model and thet-J model. We believe that this discrepancy is due to the absence of the three-site interaction term in thet-J model. |
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Keywords: | Quantized spin models |
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