Intersite electron correlations in a Hubbard model on inhomogeneous lattices

Nayuta Takemori, Akihisa Koga, Hartmut Hafermann

Research output: Contribution to journalConference articlepeer-review

5 Citations (Scopus)


We study intersite electron correlations in the half-filled Hubbard model on square lattices with periodic and open boundary conditions by means of a real-space dual fermion approach. By calculating renormalization factors, we clarify that nearest-neighbor intersite correlations already significantly reduce the critical interaction. The Mott transition occurs at U/t ∼ 6.4, where U is the interaction strength and t is the hopping integral. This value is consistent with quantum Monte Carlo results. It shows the importance of short-range intersite correlations, which are taken into account in the framework of the real-space dual fermion approach.

Original languageEnglish
Article number012040
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - Feb 5 2016
Externally publishedYes
EventTMU International Symposium on New Quantum Phases Emerging from Novel Crystal Structure - Tokyo, Japan
Duration: Sept 24 2015Sept 25 2015

ASJC Scopus subject areas

  • General Physics and Astronomy


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