Antiferromagnetic Phases of the Kondo Lattice

Abstract

We discuss the paramagnetic and Neel-ordered phases of the Kondo lattice Hamiltonian on the 2D square lattice by means of bond Fermions. In the doped case we find two antiferromagnetic solutions, the first one with small ordered moment, heavy bands, and an antiferromagetically folded large Fermi surface - i.e. including the localized spins - the second one with large ordered moment, light bands and an antiferromagnetically folded conduction electron-only Fermi surface. The zero temperature phase diagram as a function of Kondo coupling and conduction electron density shows first and second order transition lines between the three different phases and agrees qualitatively with previous numerical studies. We compare to experiments on CeRh(1-x)Co(x)In(5) and find qualitative agreement.

arXiv comment12 pages, 11 Postscript figures

References in corpus (26)

• Fermi-liquid instabilities at magnetic quantum phase transitions
• Weak magnetism and non-Fermi liquids near heavy-fermion critical points
• Spin-ladders with spin gaps: A description of a class of cuprates
• Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model
• Fermi Surface Reconstruction without Breakdown of Kondo Screening at Quantum Critical Point
• Kondo Destruction and Quantum Criticality in Kondo Lattice Systems
• Coexisting Kondo singlet state with antiferromagnetic long-range order: A possible ground state for Kondo insulators
• Fermi-surface evolution across the magnetic phase transition in the Kondo lattice model
• Fermi surface topology of the two-dimensional Kondo lattice model: a dynamical cluster approximation approach
• From itinerant to local-moment antiferromagnetism in Kondo lattices: Adiabatic continuity vs. quantum phase transitions
• Strong coupling theory of heavy fermion criticality
• Fermi Surface Reconstruction in CeRh${}_{1-x}$Co${}_x$In${}_5$
• Evolution of the Fermi Surface across a Magnetic Order-Disorder Transition in the Two-Dimensional Kondo Lattice Model: A Dynamical Cluster Approach
• Magnetic phases in the correlated Kondo-lattice model
• Many-body band structure and Fermi surface of the Kondo lattice
• Variational Monte Carlo approach to the two-dimensional Kondo lattice model
• Fermi surface and antiferromagnetism in the Kondo lattice: an asymptotically exact solution in d>1 Dimensions
• Competition between unconventional superconductivity and incommensurate antiferromagnetic order in CeRh1-xCoxIn5
• Bond operator mean field theory of the half filled Kondo lattice model
• Heavy Quasiparticles in the Anderson Lattice Model
• Phase Transitions in the Symmetric Kondo Lattice Model in Two and Three Dimensions
• New Magnetic State in Incommensurate Magnetic Phase of Heavy-Fermion Superconductor CeRh0.6Co0.4In5
• Single particle excitations of the Kondo lattice
• Lifshitz transitions in a heavy-Fermion liquid driven by short-range antiferromagnetic correlations in the two-dimensional Kondo lattice model
• Lifshitz Transitions in Magnetic Phases of the Periodic Anderson Model
• Faithful fermionic representations of the Kondo lattice model

Cited by in corpus (5)

• Effects of an Additional Conduction Band on Singlet-Antiferromagnet Competition in the Periodic Anderson Model
• Antiferromagnetic phase of the Kondo-insulator
• Phase diagram of Kondo-Heisenberg model on honeycomb lattice with geometrical frustration
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Bond particle theory for the pseudogap phase of underdoped cuprates