Dynamic Correlations in Doped 1D Kondo Insulator - Finite-T DMRG Study -

Naokazu Shibata, Hirokazu Tsunetsugu

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

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. Sc(ω), Sf(ω), and Nc(ω), and quasiparticle density of states ρ(ω) 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 characterised by the spin gap at half filling. A sharp peak at ω = 0 evolves at low temperatures in Sf(ω) and Nc(ω). This may be evidence of the formation of collective excitations, and this confirms that the metallic-phase is a Tomonaga-Luttinger liquid in the low-temperature limit.

Original languageEnglish
Pages (from-to)3138-3141
Number of pages4
Journaljournal of the physical society of japan
Volume68
Issue number10
DOIs
Publication statusPublished - 1999 Oct
Externally publishedYes

Keywords

  • Density matrix
  • Density of states
  • Dynamic correlation functions
  • Heavy fermion
  • Kondo insulator
  • Kondo lattice
  • Renormalization group
  • Tomonaga-Luttinger liquid
  • Transfer matrix

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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