The Antiferromagnetic Ground State of a Half-Filled Hubbard Model
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منابع مشابه
Comment on "Ground-state phase diagram of a half-filled one-dimensional extended Hubbard model".
The density-matrix renormalization group is used to study the phase diagram of the one-dimensional half-filled Hubbard model with on-site (U) and nearest-neighbor (V) repulsion and hopping t. A critical line V(c)(U) approximately U/2 separates a Mott insulating phase from a charge-density-wave phase. The formation of bound charge excitations for V>2t changes the phase transition from continuous...
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Thereza Paiva,1 R. T. Scalettar,2 W. Zheng,3 R. R. P. Singh,2 and J. Oitmaa3 1Instituto de Física, Universidade Federal do Rio de Janeiro, Caixa Postal 68.528, 21945-970 Rio de Janeiro, RJ, Brazil 2Physics Department, University of California, Davis, California 95616, USA 3School of Physics, University of New South Wales, Sydney NSW 2052, Australia Received 22 June 2004; revised manuscript rece...
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As a prototype model of antiferromagnetism, we propose a repulsive Hubbard Hamiltonian defined on a graph Λ = A∪B with A∩B = ∅ and bonds connecting any element of A with all the elements of B. Since all the hopping matrix elements associated with each bond are equal, the model is invariant under an arbitrary permutation of the A-sites and/or of the B-sites. This is the Hubbard model defined on ...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1975
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.54.1289