Heavy-fermion system: Superconducting and magnetic fluctuations within a periodic-cluster Hubbard model
Ariel Reich, L. M. Falicov
DOI 10.1103/PhysRevB.38.11199 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
An exact solution of an eight-site crystal model with periodic boundary conditions, a small face-centered-cubic crystal, is presented for the case of a heavy-fermion system. The model consists of (a) single, fully symmetric orbital per site, with nearest-neighbor and second-nearest-neighbor hopping; (b) an infinite Coulomb repulsion between electrons on the same site; (c) antiferromagnetic superexchange interactions; and (d) band fillings near half filling (six, seven, and eight electrons per cluster). The superconducting and the antiferromagnetic correlations are studied and compared with the predictions of the noninteracting limit. The suitability of Bardeen-Cooper-Schrieffer and Gutzwiller approximate ground-state wave functions are quantitatively estimated.
Similar papers
Superconductivity and antiferromagnetism for an extended Hubbard Hamiltonian: Role of correlated hopping in a single-band model
similarity 0.91G. A. Lara & G. G. Cabrera
Source status unknown — claims are unverified
Superconductivity and antiferromagnetism in the two-dimensional Hubbard model: A variational study
similarity 0.90D. Eichenberger & D. Baeriswyl
Source status unknown — claims are unverified
Superconductivity in the Orbital Degenerate Model for Heavy Fermion Systems
similarity 0.90Tetsuya Takimoto et al. · 2002 · arXiv:cond-mat/0212467
Source status unknown — claims are unverified
Superconductivity in an exactly solvable Hubbard model with bond-charge interaction
similarity 0.90Andreas Schadschneider
Source status unknown — claims are unverified
Magnetic and pair correlations of the Hubbard model with next-nearest-neighbor hopping
similarity 0.89Alain F. Veilleux et al. · 1995 · arXiv:cond-mat/9507045
Source status unknown — claims are unverified
Superconductivity in the Hubbard model with correlated hopping: Slave-boson study
similarity 0.89Bogdan R. Bułka
Source status unknown — claims are unverified