Quasiparticles in the Kondo lattice model at partial fillings of the conduction band

Abstract

We study the spectral properties of the one-dimensional Kondo lattice model as function of the exchange coupling, the band filling, and the quasimomentum in the ferromagnetic and paramagnetic phase. Using the density-matrix renormalization group method, we compute the dispersion relation of the quasiparticles, their lifetimes, and the Z-factor. As a main result, we provide evidence for the existence of the spinpolaron at partial band fillings. We find that the quasiparticle lifetime differs by orders of magnitude between the ferromagnetic and paramagnetic phase and depends strongly on the quasimomentum.

9 pages, 9 figures

References in corpus (5)

• The density-matrix renormalization group
• Small Fermi surface in the one-dimensional Kondo lattice model
• Quasiparticle Dynamics in the Kondo Lattice Model at Half Filling
• Correlation exponent K_rho of the one-dimensional Kondo lattice model
• Fingerprints of the Magnetic Polaron in Nonequilibrium Electron Transport through a Quantum Wire Coupled to a Ferromagnetic Spin Chain

Cited by in corpus (16)

• The density-matrix renormalization group in the age of matrix product states
• Lanczos algorithm with Matrix Product States for dynamical correlation functions
• Spin-selective Kondo insulator: Cooperation of ferromagnetism and Kondo effect
• Ferromagnetic state in the one-dimensional Kondo lattice model
• Spin-incoherent behavior in the ground state of strongly correlated systems
• Implementation of the SU(2) Hamiltonian Symmetry for the DMRG Algorithm
• Antiferromagnetic phase of the Kondo-insulator
• Matrix Product Study of Spin Fractionalization in the 1D Kondo Insulator
• Coulomb interaction effects and electron spin relaxation in the 1d Kondo lattice model
• Quasiparticle Band Structure and Spin Excitation Spectrum of the Kondo Lattice
• Ground-state phase diagram of the $S=1$ one-dimensional Kondo lattice model with a uniaxial anisotropy under transverse fields
• Class of variational ansaetze for the "spin-incoherent" ground-state of a Luttinger liquid coupled to a spin bath
• Spin fractionalization in a Kondo-lattice superconductor heterostructure
• Inconsistency of the photoemission spectrum with the spectral function in Kondo systems
• Nonlinear response induced by Ferromagnetism in a Noncentrosymmetric Kondo Lattice system
• Charge carrier relaxation dynamics in the one-dimensional Kondo lattice model