Dynamic correlations in doped 1D Kondo insulator: Finite-T DMRG study

Abstract

The finite-T DMRG method is applied to the one-dimensional Kondo lattice model to calculate dynamic correlation functions. Dynamic spin and charge correlations, S_f(omega), S_c(omega), and N_c(omega), and quasiparticle density of states rho(omega) are calculated in the paramagnetic metallic phase for various temperatures and hole densities. Near half filling, it is shown that a pseudogap grows in these dynamic correlation functions below the crossover temperature characterized by the spin gap at half filling. A sharp peak at omega=0 evolves at low temperatures in S_f(omega) and N_c(omega). This may be an evidence of the formation of the collective excitations, and this confirms that the metallic phase is a Tomonaga-Luttinger liquid in the low temperature limit.

5 pages, 6 Postscript figures, REVTeX

References in corpus (5)

• Low-temperature coherence in the periodic Anderson model: Predictions for photoemission of heavy Fermions
• Temperature-induced gap formation in dynamic correlation functions of the one-dimensional Kondo insulator --- Finite-temperature density-matrix renormalization-group study ---
• Thermodynamic properties of the one-dimensional Kondo insulators studied by the density matrix renormalization group method
• Thermodynamics of doped Kondo insulator in one dimension: Finite Temperature DMRG Study
• Fermiology of a 1D heavy electron metal

Cited by in corpus (7)

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• New Trends in Density Matrix Renormalization
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• The one dimensional Kondo lattice model at partial band filling
• Application of the density matrix renormalization group method to finite temperatures and two-dimensional systems
• SU($\mathbf{N}$) Kondo-Heisenberg chain: Phase diagram, Ising criticality, and the coexistence of heavy quasiparticles and valence bond solid order
• Flow equations for the one-dimensional Kondo lattice model: Static and dynamic ground state properties