Charge order in a two-dimensional kondo lattice model

Takahiro Misawa, Junki Yoshitake, Yukitoshi Motome

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The possibility of charge order is theoretically examined for the Kondo lattice model in two dimensions, which does not include bare repulsive interactions. Using two complementary numerical methods, we find that charge order appears at quarter filling in an intermediate Kondo coupling region. The charge ordered ground state is an insulator exhibiting an antiferromagnetic order at charge-poor sites, while the paramagnetic charge-ordered state at finite temperatures is metallic with pseudogap behavior. We confirm that the stability of charge order is closely related with the local Kondo-singlet formation at charge-rich sites. Our results settle the controversy on charge order in the Kondo lattice model in realistic spatial dimensions.

Original languageEnglish
Article number246401
JournalPhysical Review Letters
Volume110
Issue number24
DOIs
Publication statusPublished - 2013 Jun 11
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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