Magnetization processes and existence of reentrant phase transitions in coupled spin-electron model on doubly decorated planar lattices

Abstract

An alternative model for a description of magnetization processes in coupled 2D spin-electron systems has been introduced and rigorously examined using the generalized decoration-iteration transformation and the corner transfer matrix renormalization group method. The model consists of localized Ising spins placed on nodal lattice sites and mobile electrons delocalized over the pairs of decorating sites. It takes into account a hopping term for mobile electrons, the Ising coupling between mobile electrons and localized spins as well as the Zeeman term acting on both types of particles. The ground-state and finite-temperature phase diagrams were established and comprehensively analyzed. It was found that the ground-state phase diagrams are very rich depending on the electron hopping and applied magnetic field. The diversity of magnetization curves can be related to intermediate magnetization plateaus, which may be continuously tuned through the density of mobile electrons. In addition, the existence of several types of reentrant phase transitions driven either by temperature or magnetic field was proven.

13 pages, 9 figures

References in corpus (7)

• The ALPS project release 1.3: open source software for strongly correlated systems
• Reentrant phase transitions of a coupled spin-electron model on doubly decorated planar lattices with two or three consecutive critical points
• Investigation of the physical properties of the tetragonal CeMAl4Si2 (M = Rh, Ir, Pt) compounds
• Formation of charge and spin ordering in strongly correlated electron systems
• Ground-state and magnetocaloric properties of a coupled spin-electron double-tetrahedral chain (exact study at the half filling)
• Finite temperature properties of the triangular lattice t-J model, applications to Na${}_x$CoO${}_2$
• Doping-dependent magnetization plateaus of a coupled spin-electron chain: exact results

Cited by in corpus (8)

• Conventional and inverse magnetocaloric and electrocaloric effects of a mixed spin-(1/2, 1) Heisenberg dimer
• Enhanced magnetoelectric effect of exactly solved spin-electron model on a doubly decorated square lattice in vicinity of a continuous phase transition
• Influence of applied electric and magnetic fields on a thermally-induced reentrance of a coupled spin-electron model on a decorated square lattice
• Conventional and rotating magnetoelectric effect of a half-filled spin-electron model on a doubly decorated square lattice
• Rotating magnetoelectric effect in a ground state of a coupled spin-electron model on a doubly decorated square lattice
• The influence of further-neighbor spin-spin interaction on a ground state of 2D coupled spin-electron model in a magnetic field
• Insights into Magnetic Properties of a Mixed Spin-Electron Model on Decorated Planar Lattices Composed of Half-filled Trigonal Bipyramids
• Comparative Study of a Critical Behavior of a Coupled Spin-Electron Model on a Doubly Decorated Square Lattice in the Canonical and Grand-Canonical Ensemble