Variational Monte-Carlo Studies of Hubbard Model. III. Intersite Correlation Effects

Hisatoshi Yokoyama, Hiroyuki Shiba

研究成果: Article査読

116 被引用数 (Scopus)

抄録

New variational wave functions are introduced to describe the Hubbard model in strong correlation. Intersite correlation (or Jastrow) factors are taken into account beyond the Gutzwiller wave function (GF). A study is made on the one-dimensional lattice and the two-dimensional square lattice at half-filling as well as less-than-half-filling. Much improvement can be achieved thereby in the description of physical quantities such as the momentum distribution and spin and charge density correlation functions. In addition, the ground state energy is lowered appreciably compared with the GF. In this connection, the Mott-Hubbard-type metal-insulator transition is also re-examined.

本文言語English
ページ(範囲)3669-3686
ページ数18
ジャーナルjournal of the physical society of japan
59
10
DOI
出版ステータスPublished - 1990 1 1
外部発表はい

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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