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2002 | 101 | 4 | 549-557
Article title

Extended Hubbard Model in the Dimer Representation. II. Lattice Hamiltonian in the Large U Limit

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EN
Abstracts
EN
Using the exact decomposition of the sc lattice into a set of interacting dimers (each dimer is described by the extended Hubbard Hamiltonian) and exact solution of the dimer problem (preceding paper) we exactly find the form of the extended Hubbard model in the case of a crystal in the large U limit. We apply a new, nonperturbative approach based on the exact projection procedure onto a dimer subspace occupied by electrons in this limit (it is the only assumption). The resulting Hamiltonian is very complicated and contains a variety of multiple magnetic and nonmagnetic interactions deeply hidden in its original form (site representation). We also present a simplified version of the model to better visualize a mixture of different interactions resulting from this approach.
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Publisher

Year
Volume
101
Issue
4
Pages
549-557
Physical description
Dates
published
2002-04
received
2001-12-14
Contributors
author
  • Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland
author
  • Institute of Physics, Silesian University, Uniwersytecka 4, 40-007 Katowice, Poland
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv101n406kz
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