Antiferromagnetic magnons and local anisotropy: dynamical mean-field study

Abstract

We present a dynamical mean-field study of antiferromagnetic magnons in one-, two- and three-orbital Hubbard model of square and bcc cubic lattice at intermediate coupling strength. Weinvestigate the effect of anisotropy introduced by an external magnetic field or single-ion anisotropy.For the latter we tune continuously between the easy-axis and easy-plane models. We also analyzea model with spin-orbit coupling in cubic site-symmetry setting. The ordered states as well as themagnetic excitations are sensitive to even a small breaking ofSU(2)symmetry of the model andfollow the expectations of spin-wave theory as well as general symmetry considerations.

arXiv comment8 pages, 6 figures

References in corpus (42)

• Electronic Structure Calculations with Dynamical Mean-Field Theory: A Spectral Density Functional Approach
• A continuous-time solver for quantum impurity models
• The ALPS project release 2.0: Open source software for strongly correlated systems
• Finite-Size Scaling of the Ground State Parameters of the Two-Dimensional Heisenberg Model
• Diagrammatic routes to nonlocal correlations beyond dynamical mean field theory
• Dynamical vertex approximation - a step beyond dynamical mean field theory
• Unified Description of Nambu-Goldstone Bosons without Lorentz Invariance
• Orthogonal Polynomial Representation of Imaginary-Time Green's Functions
• Tracking the Footprints of Spin Fluctuations: A MultiMethod, MultiMessenger Study of the Two-Dimensional Hubbard Model
• Quantum Monte Carlo study of the two-dimensional fermion Hubbard Model
• Updated Core Libraries of the ALPS Project
• Critical properties of the half-filled Hubbard model in three dimensions
• Thermodynamics of the 3D Hubbard model on approach to the Neel transition
• Sparse modeling approach to analytical continuation of imaginary-time quantum Monte Carlo data
• The magnetic excitation spectra in BaFe${}_2$As${}_2$: a two-particle approach within DFT+DMFT
• Theory of spin and charge fluctuations in the Hubbard model
• Efficient treatment of two-particle vertices in dynamical mean-field theory
• Impact of nonlocal correlations over different energy scales: A Dynamical Vertex Approximation study
• The antiferromagnetic spin-1/2 Heisenberg model on the square lattice in a magnetic field
• Plasmons in strongly correlated systems: spectral weight transfer and renormalized dispersion
• Efficient calculation of the antiferromagnetic phase diagram of the 3D Hubbard model
• Collective Charge Excitations of Strongly Correlated Electrons, Vertex Corrections and Gauge Invariance
• Phase diagram and collective excitation in excitonic insulator: from the orbital physics viewpoint
• Excitonic condensation of strongly correlated electrons: the case of Pr${}_{0.5}$Ca${}_{0.5}$CoO${}_3$
• Mechanisms of finite temperature magnetism in the three-dimensional Hubbard model
• Continuous-time hybridization expansion quantum impurity solver for multi-orbital systems with complex hybridizations
• Collective Modes in Excitonic Magnets: Dynamical Mean-Field Study
• Effective Heisenberg model and exchange interaction for strongly correlated systems
• Self-consistent ladder D$\Gamma$A approach
• Conservation in two-particle self-consistent extensions of dynamical-mean-field-theory
• Phase diagram of exciton condensate in doped two-band Hubbard model
• Efficient evaluation of the polarization function in dynamical mean-field theory
• Sparse sampling and tensor network representation of two-particle Green's functions
• Solving the Bethe-Salpeter equation with exponential convergence
• The dynamical vertex approximation for many-electron systems with spontaneously broken SU(2)-symmetry
• Metal-insulator transition in three-band Hubbard model with strong spin-orbit interaction
• Alleviating the Sign Problem in Quantum Monte Carlo Simulations of Spin-Orbit-Coupled Multi-Orbital Hubbard Models
• Thermodynamic consistency of the charge response in dynamical mean-field based approaches
• Spin excitations in layered antiferromagnetic metals and superconductors
• Calculated g-factors of 5d double perovskites Ba2NaOsO6 and Ba2YOsO6
• Improved treatment of fermion-boson vertices and Bethe-Salpeter equations in non-local extensions of dynamical mean field theory
• Dynamical response and competing orders in two-band Hubbard model