Antiferromagnetic phase of the Kondo-insulator

Abstract

We discuss the quasiparticle band structure of the antiferromagnetic phase of the planar Kondo lattice model with a half-filled conduction band, the so-called Kondo insulator. The band structure is obtained by bond fermion technique and good agreement is obtained with the single particle spectral function obtained by Dynamical Cluster Approximation. In particular, various changes of the band structure with J/t observed in the numerical spectra are reproduced qualitatively by the calculation. In the absence of Fermi surface nesting we find a semimetallic phase for sufficiently small exchange constant and possible experimental consequences are discussed

7 pages, 7 figures

References in corpus (14)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Heavy Fermions and Quantum Phase Transitions
• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• Fermi Surface Reconstruction without Breakdown of Kondo Screening at Quantum Critical Point
• T=0 heavy fermion quantum critical point as an orbital selective Mott transition
• From itinerant to local-moment antiferromagnetism in Kondo lattices: Adiabatic continuity vs. quantum phase transitions
• Fermi surface topology of the two-dimensional Kondo lattice model: a dynamical cluster approximation approach
• Evolution of the Fermi Surface across a Magnetic Order-Disorder Transition in the Two-Dimensional Kondo Lattice Model: A Dynamical Cluster Approach
• Fermi surface and antiferromagnetism in the Kondo lattice: an asymptotically exact solution in d>1 Dimensions
• Zero-Temperature Magnetic Transition in an Easy-Axis Kondo Lattice Model
• Magnetic quantum phase transition in an anisotropic Kondo lattice
• Lifshitz transitions in a heavy-Fermion liquid driven by short-range antiferromagnetic correlations in the two-dimensional Kondo lattice model
• Competition of striped magnetic order and partial Kondo screened state in the Kondo lattice model
• Faithful fermionic representations of the Kondo lattice model

Cited by in corpus (5)

• Zooming in on heavy fermions in Kondo lattice models
• Breakdown of heavy quasiparticles in a honeycomb Kondo lattice: A quantum Monte Carlo study
• Altermagnetism in Heavy Fermion Systems: Mean-Field study on Kondo Lattice
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• SU($\mathbf{N}$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order