Dynamical properties of interacting charge system on frustrated lattices

Makoto Naka, Hiroshi Hashimoto, Sumio Ishihara

Research output: Contribution to journalArticle

Abstract

Dynamical properties in interacting fermion systems on geometrically frustrated lattices are introduced. As a minimal model for the electronic charge order phenomena, we adopt the so-called spin-less fermion V-t model where the hoppings and interactions of spin-less fermions are taken into account in frustrated lattices. By analyzing this model, we examine (1) dielectric and optical properties in a double triangular lattice, (2) a collective excitation in a dimer-molecular system on a triangular lattice, and (3) a photo-excited state in a triangular lattice. We demonstrate that frustration effects influence directly dynamical properties in these charge systems, and explain successfully recent some experimental results.

Original languageEnglish
Pages (from-to)68-72
Number of pages5
JournalPhysica B: Condensed Matter
Volume460
DOIs
Publication statusPublished - 2015 Mar 1
Externally publishedYes

Keywords

  • Charge order
  • Optical spectra
  • Photo-excitation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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