Spiral magnetic phases on the Kondo Lattice Model: A Hartree-Fock approach
arXiv:1506.00890 · doi:10.1016/j.jmmm.2016.09.061
Abstract
We study the Kondo Lattice Model (KLM) on a square lattice through a Hartree-Fock approximation in which the local spins are treated semi-classically, in the sense that their average values are modulated by a magnetic wavevector while they couple with the conduction electrons through fermion operators. In this way, we obtain a ground state phase diagram in which spiral magnetic phases (in which the wavevector depends on the coupling constants and on the density) interpolate between the low-density ferromagnetic phase and the antiferromagnetic phase at half filling; within small regions of the phase diagram commensurate magnetic phases can coexist with Kondo screening. We have also obtained `Doniach-like' diagrams, showing the effect of temperature on the ground state phases, and established that for some ranges of the model parameters (the exchange coupling and conduction electron density) the magnetic wavevector changes with temperature, either continuously or abruptly (e.g., from spiral to ferromagnetic).
arXiv comment13 pages, 15 figures
References in corpus (18)
- A Common Thread: the pairing interaction for the unconventional superconductors
- To What Extent Iron-Pnictide New Superconductors Have Been Clarified: A Progress Report
- Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model
- High-Tc Superconductivity and Antiferromagnetism in Multilayered Copper Oxides - A New Paradigm of Superconducting Mechanism -
- 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
- Coexisting Kondo singlet state with antiferromagnetic long-range order: A possible ground state for Kondo insulators
- Mean Field study of the heavy fermion metamagnetic transition
- Spin order in the one-dimensional Kondo and Hund lattices
- Variational Monte Carlo approach to the two-dimensional Kondo lattice model
- Large and Small Fermi-Surface Spin Density Waves in the Kondo Lattice Model
- Bond operator mean field theory of the half filled Kondo lattice model
- 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
- Phase evolution of the two-dimensional Kondo lattice model near half-filling
- Tuning in magnetic modes in Tb(Co_{x}Ni_{1-x})_{2}B_{2}C: from longitudinal spin-density waves to simple ferromagnetism
- Phase Diagram of the Two-Leg Kondo Ladder
- Evolution of the magnetism of Tb(Co_{x}Ni_{1-x})_{2}B_{2}C
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