Finite temperature properties of the 2D Kondo lattice model

Abstract

Using recently developed Lanczos technique we study finite-temperature properties of the 2D Kondo lattice model at various fillings of the conduction band. At half filling the quasiparticle gap governs physical properties of the chemical potential and the charge susceptibility at small temperatures. In the intermediate coupling regime quasiparticle gap scales approximately linearly with Kondo coupling. Temperature dependence of the spin susceptibility reveals the existence of two different temperature scales. A spin gap in the intermediate regime leads to exponential drop of the spin susceptibility at low temperatures. Unusual scaling of spin susceptibility is found for temperatures above 0.6 J. Charge susceptibility at finite doping reveals existence of heavy quasiparticles. A new low energy scale is found at finite doping.

REVTeX, 7 pages, 7 figures

References in corpus (3)

• Quantum Monte Carlo simulations of the half-filled two-dimensional Kondo lattice model
• Temperature-induced gap formation in dynamic correlation functions of the one-dimensional Kondo insulator --- Finite-temperature density-matrix renormalization-group study ---
• Thermodynamics of doped Kondo insulator in one dimension: Finite Temperature DMRG Study

Cited by in corpus (9)

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• Low Temperature Lanczos Method
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• Tunable "Doniach Phase Diagram" for strongly-correlated nanoclusters
• Low-energy excitations and transport functions of the one-dimensional Kondo insulator
• Finite temperature strong-coupling expansions for the Kondo lattice model
• Thermodynamics of the half-filled Kondo lattice model around the atomic limit
• Atomic-scale tailoring of spin susceptibility via non-magnetic spin-orbit impurities