Slave-Boson Approach to Electron Correlations and Magnetism in Low-Dimensional Systems
The electronic and magnetic properties of low-dimensional systems are investigated by using a saddle-point slave-boson approximation to the Hubbard model. A local approach based on a real-space expansion of the local Green’s function is presented. The changes in the electronic properties are determined as a function of the local coordination number z. Results are given for the magnetic moments, magnetic order, average number of double occupations and hopping renormalizations. The environment dependence of the electronic correlations is discussed.
KeywordsHubbard Model Coulomb Energy Local Magnetic Moment Itinerant Electron Coulomb Interaction Energy
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