ISSN:
1432-2234
Schlagwort(e):
Key words: Infinite periodic spin lattices
;
Spin function
;
Spin blocks
;
Heisenberg Hamiltonian
;
Valence bond
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Chemie und Pharmazie
Notizen:
Abstract. An approximate spin function for infinite periodic spin lattices is introduced. The “encapsulated spin function” is built from spin blocks variationally determined on open clusters. It gives a zeroth-order description of the short-range spin correlation while insuring a proper translational symmetry with an appropriate projection of the local spin function over the entire lattice. A recursion expression is derived that removes the normalization difficulty that arises in the projection. The one-dimensional Heisenberg regular Hamiltonian is tested in the present paper but the model allows for more complicated topologies of the interactions, including long-range exchange and three-spin exchange.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/s002140050392
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