Dynamical density-density correlations in one-dimensional Mott insulators

Walter Stephan, K. Penc

Research output: Contribution to journalArticle

55 Citations (Scopus)

Abstract

The dynamical density-density correlation function is calculated for the one-dimensional, half-filled Hubbard model extended with nearest-neighbor repulsion using the Lánczos algorithm for finite-size systems and analytically for large on-site repulsion compared to hopping amplitudes. At the zone boundary an excitonic feature exists for any finite nearest-neighbor repulsion and exhausts most of the spectral weight, even for parameters where no exciton is visible at zero momentum.

Original languageEnglish
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume54
Issue number24
Publication statusPublished - Dec 15 1996

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Hubbard model
Excitons
Momentum
insulators
excitons
momentum
LDS 751

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Dynamical density-density correlations in one-dimensional Mott insulators. / Stephan, Walter; Penc, K.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 54, No. 24, 15.12.1996.

Research output: Contribution to journalArticle

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