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The Slave Boson Approach for Strongly Correlated Systems. A Direct Integration of the Double Occupancy

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Published under licence by IOP Publishing Ltd
, , Citation D. Schmeltzer and A. R. Bishop 1990 EPL 12 369 DOI 10.1209/0295-5075/12/4/015

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Author affiliations

1 Theoretical Division and Advanced Studies Program, Los Alamos National Laboratory - Los Alamos, NM 87545, USA

2 Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA

3 Department of Physics, City College of the City University of New York, New York, NY 10031, USA

Dates

  1. Received 8 January 1990
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0295-5075/12/4/369

Abstract

Using the slave boson method for the 1-band Hubbard model, we derive an effective Hamiltonian in terms of charge and spin variables. For large values of the Hubbard U we recover the standard t-J model. For smaller values of U the range of interaction between the spin and charge variables is increased. We also consider the effect of an onsite electron-phonon interaction and show that the effect of integrating the double occupancy and the integration of phonons is in general not additive.

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10.1209/0295-5075/12/4/015