Quasiparticle dynamics in the Kondo lattice model at half filling

The one dimensional Kondo lattice model at partial band filling †

One-dimensional Kondo lattice model at quarter filling

We revisit the problem of the quarter-filled one-dimensional Kondo lattice model, for which the existence of a dimerized phase and a nonzero charge gap had been reported by Xavier et al. Phys. Rev. Lett. 90, 247204 2003 . Recently, some objections were raised claiming that the system is neither dimerized nor has a charge gap. In the interest of clarifying this important issue, we show that thes...

Phase evolution of the two-dimensional Kondo lattice model near half-filling.

Within a mean-field approximation, the ground state and finite temperature phase diagrams of the two-dimensional Kondo lattice model have been carefully studied as functions of the Kondo coupling J and the conduction electron concentration [Formula: see text]. In addition to the conventional hybridization between local moments and itinerant electrons, a staggered hybridization is proposed to ch...

Quantum phase transition in one dimensional extended Kondo lattice model away from half filling

We study one dimensional extended Kondo lattice model, described by the t − J Hamiltonian for conduction electrons away from half filling and the Heisenberg Hamiltonian for localized spins at half filling. Following Shankar,[1] we find an effective field theory for this model, where doped holes are represented by massless Dirac fermions (holons) and spin excitations are fractionalized into rela...

Quasiparticle scattering spectroscopy ( QPS ) of Kondo lattice

Submitted for the MAR13 Meeting of The American Physical Society Quasiparticle scattering spectroscopy (QPS) of Kondo lattice heavy fermions1 L.H. GREENE, S.M. NARASIWODEYAR, P. BANERJEE, W.K. PARK, University of Illinois at Urbana-Champaign, E.D. BAUER, P.H. TOBASH, R.E. BAUMBACH, F. RONNING, J.L. SARRAO, J.D. THOMPSON, Los Alamos National Laboratory — Point-contact spectroscopy (PCS) is a pow...