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

Naokazu Shibata; Hirokazu Tsunetsugu

doi:10.1143/JPSJ.68.3138

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

Naokazu Shibata, Hirokazu Tsunetsugu

Research output: Contribution to journal › Article › peer-review

1 Citation (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. S_c(ω), S_f(ω), and N_c(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 S_f(ω) and N_c(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 language	English
Pages (from-to)	3138-3141
Number of pages	4
Journal	journal of the physical society of japan
Volume	68
Issue number	10
DOIs	https://doi.org/10.1143/JPSJ.68.3138
Publication status	Published - 1999 Oct
Externally published	Yes

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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10.1143/JPSJ.68.3138

Cite this

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title = "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. 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.",

keywords = "Density matrix, Density of states, Dynamic correlation functions, Heavy fermion, Kondo insulator, Kondo lattice, Renormalization group, Tomonaga-Luttinger liquid, Transfer matrix",

author = "Naokazu Shibata and Hirokazu Tsunetsugu",

year = "1999",

month = oct,

doi = "10.1143/JPSJ.68.3138",

language = "English",

volume = "68",

pages = "3138--3141",

journal = "Journal of the Physical Society of Japan",

issn = "0031-9015",

publisher = "Physical Society of Japan",

number = "10",

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TY - JOUR

T1 - Dynamic Correlations in Doped 1D Kondo Insulator - Finite-T DMRG Study -

AU - Shibata, Naokazu

AU - Tsunetsugu, Hirokazu

PY - 1999/10

Y1 - 1999/10

N2 - 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.

AB - 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.

KW - Density matrix

KW - Density of states

KW - Dynamic correlation functions

KW - Heavy fermion

KW - Kondo insulator

KW - Kondo lattice

KW - Renormalization group

KW - Tomonaga-Luttinger liquid

KW - Transfer matrix

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JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

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ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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