Gutzwiller Magnetic Phase Diagram of the Undoped t-t'-U Hubbard Model

Abstract

We calculate the magnetic phase diagram of the half-filled t-t'-U Hubbard model as a function of t' and U, within the Gutzwiller approximation RPA (GA+RPA). As U increases, the system first crosses over to one of a wide variety of incommensurate phases, whose origin is clarified in terms of double nesting. We evaluate the stability regime of the incommensurate phases by allowing for symmetry-breaking with regard to the formation of spin spirals, and find a crossover to commensurate phases as U increases and a full gap opens. The results are compared with a variety of other recent calculations, and in general good agreement is found. For parameters appropriate to the cuprates, double occupancy should be only mildly suppressed in the absence of magnetic order, inconsistent with a strong coupling scenario.

PRB, 4 eps figures, revtex; http://link.aps.org/doi/10.1103/PhysRevB.81.014510

References in corpus (3)

• Role of backflow correlations for the non-magnetic phase of the t-t' Hubbard model
• Gutzwiller Magnetic Phase Diagram of the Cuprates
• Charge instabilities and electron-phonon interaction in the Hubbard-Holstein model

Cited by in corpus (9)

• Intermediate Coupling Model of the Cuprates
• Testing the Monte Carlo - Mean Field approximation in the one-band Hubbard model
• Gutzwiller Magnetic Phase Diagram of the Cuprates
• Emergence of non-Fermi-liquid behavior due to Fermi surface reconstruction in the underdoped cuprate superconductors
• Approximate solution of variational wave functions for strongly correlated systems: Description of bound excitons in metals and insulators
• Stripes in cuprate superconductors: Excitations and dynamic dichotomy
• Gutzwiller Charge Phase Diagram of Cuprates, including Electron-Phonon Coupling Effects
• Discerning electronic fingerprints of nodal and antinodal nestings and their phase coherences in doped cuprate superconductors
• Exact results for the Hubbard model on bipartite lattices in spatial dimensions $d>1$: Seven theorems from the full [SU(2)$\times$SU(2)$\times$U(1)]/${\mathbb{Z}}_2^2$ symmetry