Stability of the novel interorbital-hopping mechanism for ferromagnetism in multi-orbital Hubbard models

Abstract

Recently, it was argued that a ferromagnetic (FM) insulating phase can be induced by a novel {\it interorbital} hopping mechanism. Here, we study the stability range of this novel FM phase under modifications in the crystal fields and electronic correlation strength, constructing a theoretical phase diagram. A plethora of states is unveiled, including the FM Mott insulator (MI), a FM orbital-selective Mott phase (OSMP), several anferromagnetic (AFM) MI phases, an AFM metallic state, and a FM metal as well. Our most interesting result is that the FM regime, either in MI or OSMP forms, is shown to be stable in {\it large} portions of the phase diagram, at both intermediate and strong electronic correlations, respectively. Our results demonstrate via a detailed example that the recently proposed novel mechanism to stabilize FM insulators is not fragile but instead robust, and may enlarge substantially the relatively small family of known FM insulators.

10 pages, 5 figures

References in corpus (21)

• Magnetism and its microscopic origin in iron-based high-temperature superconductors
• Orbital effects in solids: basics, recent progress and opportunities
• Observation of Temperature-Induced Crossover to an Orbital-Selective Mott Phase in A${}_x$Fe${}_{2-y}$Se${}_2$ (A=K, Rb) Superconductors
• Orbital-selective Mott Phase in Multiorbital Models for Alkaline Iron Selenides K(1-x)Fe(2-y)Se2
• Probing Magnetism in Insulating Cr2Ge2Te6 by Induced Anomalous Hall Effect in Pt
• Spectral Functions with the Density Matrix Renormalization Group: Krylov-space Approach for Correction Vectors
• Orbital-dependent singlet dimers and orbital-selective Peierls transitions in transition metal compounds
• Magnetic Proximity Effect in Pt/CoFe2O4 Bilayers
• Peierls transition, ferroelectricity, and spin-singlet formation in the monolayer VOI${}_2$
• Non-local correlations in the orbital selective Mott phase of a one dimensional multi-orbital Hubbard model
• Orbital-selective Peierls phase in the metallic dimerized chain MoOCl${}_2$
• Origin of insulating ferromagnetism in iron oxychalcogenide Ce${}_2$O${}_2$FeSe${}_2$
• Magnetic states of quasi-one-dimensional iron chalcogenide Ba${}_2$FeS${}_3$
• Antiferromagnetic fluctuations and orbital-selective Mott transition in the van der Waals ferromagnet Fe3-xGeTe2
• Prediction of exotic magnetic states in the alkali metal quasi-one-dimensional iron selenide compound Na${}_2$FeSe${}_2$
• Prediction of orbital selective Mott phases and block magnetic states in the quasi-one-dimensional iron chain Ce${}_2$O${}_2$FeSe${}_2$ under hole and electron doping
• Orbital ordering in the layered perovskite material CsVF${}_4$
• Magnetism of the Fe${}^{2+}$ and Ce${}^{3+}$ sublattices in Ce${}_2$O${}_2$FeSe${}_2$: a combined neutron powder diffraction, inelastic neutron scattering and density functional study
• Quantum magnetism of iron-based ladders: Blocks, spirals, and spin flux
• Properties of La${}_{0.7}$Ca${}_{0.3}$MnO${}_3$ Under Extreme Tensile Strain
• J = 0 nonmagnetic insulating state in K${}_2$Os$X_6$ (X = F, Cl and Br)

Cited by in corpus (11)

• Trends in electronic structures and $s_{\pm }$-wave pairing for the rare-earth series in bilayer nickelate superconductor $R_3$Ni${}_2$O${}_7$
• Electronic structure, magnetic correlations, and superconducting pairing in the reduced Ruddlesden-Popper bilayer La${}_3$Ni${}_2$O${}_6$ under pressure: different role of $d_{3z^2-r^2}$ orbital compared with La${}_3$Ni${}_2$O${}_7$
• Magnetic phase diagram of a two-orbital model for bilayer nickelates varying doping
• Extended Hubbard model describing small multi-dot arrays in bilayer graphene
• Magnetic Correlations and Pairing Tendencies of the Hybrid Stacking Nickelate Superlattice La${}_7$Ni${}_5$O${}_{17}$ (La${}_3$Ni${}_2$O${}_7$/La${}_4$Ni${}_3$O${}_{10}$) under Pressure
• Electronic Structure, Magnetic and Pairing Tendencies of Alternating Single-layer Bilayer Stacking Nickelate La${}_5$Ni${}_3$O${}_{11}$ Under Pressure
• General trends of electronic structures, superconducting pairing, and magnetic correlations in the Ruddlesden-Popper nickelate $m$-layered superconductors La${}_{m+1}$Ni${}_m$O${}_{3m+1}$
• Compressive Strain Turns $s^{\pm }$ into $d$-Wave Pairing in One-unit-cell La${}_3$Ni${}_2$O${}_7$ Thin Film Via Substrate-Induced Hole Doping
• Block Mott insulating state induced by next-nearest neighbor hopping in the S = 3/2 zigzag chain BaCoTe2O7
• Magnon damping and mode softening in quantum double-exchange ferromagnets
• Intertwined charge, spin, and orbital degrees of freedom under electronic correlations in the one-dimensional Fe${}^{3+}$ chalcogenide chain