Electron Orderings of Half-Filled Extended Hubbard Models with Spin- and Charge-Exchange Interaction

• Authors: W Czart , S Robaszkiewicz
• Languages of publication: EN

Abstracts

EN

The electron orderings of the half-filled extended Hubbard models (i) with anisotropic spin-exchange interactions (the t-U-J_ǁ-J_⊥ model) and (ii) with charge-exchange interaction (the t-U-I model) are discussed. In particular, we present new results concerning the phase diagrams of the model (i) in the case of uniaxial spin exchange (J_ǁ≢0) for d-dimensional hypercubic lattices (1≤d≤∞) and conclude about the basic effects of the particular spin- and charge-exchange interaction terms (J_ǁ, J_⊥, and I) in both models.

Keywords

EN

71.10.Fd; 75.10.-b; 75.30.Gw; 71.45.Lr; 74.20.-z

Discipline

• 74.20.-z: Theories and models of superconducting state
• 75.30.Gw: Magnetic anisotropy
• 71.45.Lr: Charge-density-wave systems(see also 75.30.Fv Spin-density waves)
• 71.10.Fd: Lattice fermion models (Hubbard model, etc.)
• 75.10.-b: General theory and models of magnetic ordering(see also 05.50.+q Lattice theory and statistics)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2006
• Volume: 109
• Issue: 4-5
• Pages: 577-582

Dates

published

2006-04

received

2005-09-25

Contributors

author

W Czart

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

author

S Robaszkiewicz

• Institute of Physics, A. Mickiewicz University, Umultowska 85, 61-614 Poznań, Poland

References

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Identifiers

DOI

10.12693/APhysPolA.109.577