Ground-state phase diagrams of the generalized Falicov-Kimball model with Hund coupling

Abstract

Charge and spin orderings are studied on the simplest 1D and the 2D square lattice within the generalized Falicov-Kimball model with Hund coupling between localized and itinerant electrons. Using the restricted phase diagrams method (RPDM) a number of simple rules of formation of various sorts of ground state phases have been detected. In particular, relationships between density of current carriers (electrons or holes) and type of charge and magnetic arrangement has been determined. In 2D in the mixed valence regime only axial stripes (vertical or horizontal) have been found for intermediate values of the coupling constants. They are composed of ferromagnetic or antiferromagnetic chains interchanged with non-magnetic ones. For band fillings close to the half filling stripe phases oriented along one of the main diagonal direction are formed. The results suggest a possibility of tuning modulations of charge and magnetic superstructures with a change of doping.

arXiv comment10 pages, 6 figures; Fig. 2 slightly modified and the text adjusted accordingly, references added

References in corpus (30)

• Correlated Electrons in High Temperature Superconductors
• Energetics of Domain Walls in the 2D t-J model
• Competition Between Stripes and Pairing in a t-t'-J Model
• Microscopic conditions favoring itinerant ferromagnetism: Hund's rule coupling and orbital degeneracy
• Phase separation and stripe formation in the 2D t-J model: a comparison of numerical results
• Hund's coupling and the metal-insulator transition in the two-band Hubbard model
• Spontaneous rearrangement of the checkerboard charge order to stripe order in La1.5Sr0.5NiO4
• Stripes and the t-J model
• Stripe phases in the two-dimensional Falicov-Kimball model
• Charge fluctuations close to phase separation in the two dimensional t-J model
• New Type of Charge and Magnetic order in the Ferromagnetic Kondo Lattice
• Topological doping and the stability of stripe phases
• Island phases and charge order in two-dimensional manganites
• Green's Function Monte Carlo for Lattice Fermions: Application to the t-J Model
• Model of charge and magnetic order formation in itinerant electron systems
• Spin order in the one-dimensional Kondo and Hund lattices
• Slave-boson approach to the metallic stripe phases with large unit cells
• Instability of charge ordered states in doped antiferromagnets
• Doped Antiferromagnets in High Dimension
• Microscopic origin of diagonal stripe phases in doped nickelates
• Phase separation in a two-band model for strongly correlated electrons
• Phase separation in the 2D Hubbard model: a fixed-node quantum Monte Carlo study
• Charge stripes due to electron correlations in the two-dimensional spinless Falicov-Kimball model
• Ground states of the generalized Falicov-Kimball model in one and two dimensions
• Canonical Phase Diagrams of the 1-D Falicov-Kimball Model at T=0
• Limits on Phase Separation for Two-Dimensional Strongly Correlated Electrons
• Formation of charge-stripe phases in a system of spinless fermions or hardcore bosons
• Hund's rule and metallic ferromagnetism
• Charge Order in the Falicov-Kimball Model
• Influence of anisotropic next-nearest-neighbor hopping on diagonal charge-striped phases

Cited by in corpus (6)

• Numerical study of magnetization processes in rare-earth tetraborides
• Formation of charge and spin ordering in strongly correlated electron systems
• Enhancement of the d-wave pairing correlations by charge and spin ordering in the spin-one-half Falicov-Kimball model with Hund and Hubbard~coupling
• Electronic transport through correlated electron systems with nonhomogeneous charge orderings
• Influence of spin ordering on superconducting correlations in the spin-one-half Falicov-Kimball model with Hund and Hubbard coupling
• Extended Falicov-Kimball model at weak onsite and intersite Coulomb interactions