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

Naokazu Shibata, Hirokazu Tsunetsugu

研究成果: Article査読

12 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)3138-3141
ページ数4
ジャーナルjournal of the physical society of japan
68
10
DOI
出版ステータスPublished - 1999 10月
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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