Coexisting Kondo singlet state with antiferromagnetic long-range order: A possible ground state for Kondo insulators

Abstract

The ground-state phase diagram of a half-filled anisotropic Kondo lattice model is calculated within a mean-field theory. For small transverse exchange coupling $J_{\perp }<J_{\perp c1}$, the ground state shows an antiferromagnetic long-range order with finite staggered magnetizations of both localized spins and conduction electrons. When $J_{\perp }>J_{\perp c2}$, the long-range order is destroyed and the system is in a disordered Kondo singlet state with a hybridization gap. Both ground states can describe the low-temperature phases of Kondo insulating compounds. Between these two distinct phases, there may be a coexistent regime as a result of the balance between local Kondo screening and magnetic interactions.

four pages, Revtex, one figure; to be published in Phys. Rev. B, 1 July issue, 2000

References in corpus (1)

• Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model

Cited by in corpus (47)

• Quantum Criticality and Global Phase Diagram of Magnetic Heavy Fermions
• Spin and charge dynamics of the ferromagnetic and antiferromagnetic two-dimensional half-filled Kondo lattice model
• Fermi Surface Reconstruction without Breakdown of Kondo Screening at Quantum Critical Point
• Fermi surface topology of the two-dimensional Kondo lattice model: a dynamical cluster approximation approach
• The one dimensional Kondo lattice model at partial band filling
• Field-induced Antiferromagnetism and the Kondo Insulator-to-Metal Transition
• Evolution of the Fermi Surface across a Magnetic Order-Disorder Transition in the Two-Dimensional Kondo Lattice Model: A Dynamical Cluster Approach
• Depleted Kondo Lattices
• Doping-dependent character and possible magnetic ordering of NdNiO${}_2$
• Variational Monte Carlo approach to the two-dimensional Kondo lattice model
• Bond operator mean field theory of the half filled Kondo lattice model
• Mean-field description of odd-frequency superconductivity with staggered ordering vector
• Weak ferromagnetism with the Kondo screening effect in the Kondo lattice systems
• Kondo screening coexisting with ferromagnetic order as a possible ground state for Kondo lattice systems
• Coherence scale of the two-dimensional Kondo Lattice model
• Kondo Lattice Model with Finite Temperature Lanczos Method
• Phase diagram and dynamics of the SU($\mathbf{N}$) symmetric Kondo lattice model
• Lifshitz transitions in a heavy-Fermion liquid driven by short-range antiferromagnetic correlations in the two-dimensional Kondo lattice model
• Heavy antiferromagnetic phases in Kondo lattices
• Hybridization fluctuations in the half-filled periodic Anderson model
• Spiral magnetic phases on the Kondo Lattice Model: A Hartree-Fock approach
• Mutual information, quantum phase transition, and phase coherence in Kondo systems
• Single-hole dynamics in the half-filled two-dimensional Kondo-Hubbard model
• Zero Temperature Series Expansions for the Kondo Lattice Model
• Faithful fermionic representations of the Kondo lattice model
• Antiferromagnetic phase of the Kondo-insulator
• Unconventional full-gap superconductivity in Kondo lattice with semi-metallic conduction bands
• Pairing symmetry of heavy fermion superconductivity in the two-dimensional Kondo-Heisenberg lattice model
• Phase evolution of the two-dimensional Kondo lattice model near half-filling
• Antiferromagnetic Phases of the Kondo Lattice
• Kondo lattice model with a direct exchange interaction between localized moments
• Breakdown of heavy quasiparticles in a honeycomb Kondo lattice: A quantum Monte Carlo study
• Half-filled Kondo lattice on the honeycomb lattice
• Topological antiferromagnetic spin-density-wave phase in an extended Kondo lattice model
• Development of long-range phase coherence on the Kondo lattice
• Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice
• Collective excitations from composite orders in Kondo lattice with non-Kramers doublets
• Effect of anisotropy in the $S=1$ underscreened Kondo lattice
• Two-Impurity Anderson model in an Antiferromagnetic metal: zero-bandwidth limit
• Topological quantum phase transition in Kane-Mele-Kondo lattice model
• Phase diagram of Kondo-Heisenberg model on honeycomb lattice with geometrical frustration
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Superconducting Kondo phase in an orbitally-separated bilayer
• Magnetic quantum phase transition in a metallic Kondo heterostructure
• Heavy quasiparticle bands in the underscreened quasiquartet Kondo lattice
• Vortex bound state of Kondo lattice coupled to compensated metal
• Optical and magnetic excitations in the underscreened quasi-quartet Kondo lattice