Analysis of checkerboard electron system by path-integral renormalization group method

T. Yoshioka; A. Koga; N. Kawakami

doi:10.1016/j.physb.2006.01.108

Analysis of checkerboard electron system by path-integral renormalization group method

T. Yoshioka, A. Koga, N. Kawakami

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

6 Citations (Scopus)

Abstract

We study the ground state properties of a geometrically frustrated Hubbard model on the checkerboard lattice by means of the path-integral renormalization group method. We calculate the charge and spin correlation functions to investigate instabilities to the charge and/or spin-ordered states. In contrast to the recent claim based on a renormalized mean-field treatment, charge correlations are uniformly suppressed while spin correlations are enhanced at certain wave vectors.

Original language	English
Pages (from-to)	294-296
Number of pages	3
Journal	Physica B: Condensed Matter
Volume	378-380
Issue number	SPEC. ISS.
DOIs	https://doi.org/10.1016/j.physb.2006.01.108
Publication status	Published - 2006 May 1
Externally published	Yes

Keywords

Checkerboard lattice
Geometrical frustration
Hubbard model

ASJC Scopus subject areas

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

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AB - We study the ground state properties of a geometrically frustrated Hubbard model on the checkerboard lattice by means of the path-integral renormalization group method. We calculate the charge and spin correlation functions to investigate instabilities to the charge and/or spin-ordered states. In contrast to the recent claim based on a renormalized mean-field treatment, charge correlations are uniformly suppressed while spin correlations are enhanced at certain wave vectors.

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KW - Geometrical frustration

KW - Hubbard model

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