We propose an approximation scheme for the 2D t-J model following the composite operator method. Five fields, coming from the exact solution of the 2-site system, are used as operatorial basis. The equations of motion are linearized by means of a self-decoupling scheme and all the unknown parameters, to be used to fix the representation of the Green's function, are computed by means of Pauli constrains. © 2002 Elsevier Science B.V. All rights reserved.
The 2D t-J model: A proposal for an analytical study
AVELLA, Adolfo;MANCINI, Ferdinando
2002
Abstract
We propose an approximation scheme for the 2D t-J model following the composite operator method. Five fields, coming from the exact solution of the 2-site system, are used as operatorial basis. The equations of motion are linearized by means of a self-decoupling scheme and all the unknown parameters, to be used to fix the representation of the Green's function, are computed by means of Pauli constrains. © 2002 Elsevier Science B.V. All rights reserved.File in questo prodotto:
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