Charge susceptibility of the Hubbard chain with next-nearest-neighbor hopping

Hiroki Nakano*, Yoshinori Takahashi, Masatoshi Imada

*この研究の対応する著者

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Metal-insulator transition is one of hot issues in condensed-matter physics. The transition between the doped metal and the Mott insulator can be realized in the Hubbard model theoretically. It was recently found that the ground state of the one-dimensional Hubbard model with next-nearest-neighbor hopping clearly shows partial ferromagnetism in the metallic phase near the half-filled Mott insulator. We study the hole density (δ) dependence of the charge susceptibility (χc) of this model by means of exact diagonalization of finite-size clusters. The behavior of the charge susceptibility characterizes the nature of the metal-insulator transition. We find that a region where the critical exponent α defined by χc∝δ-α is α=3 in sharp contrast with the known exponent α=1 in the ordinary one-dimensional Hubbard model.

本文言語English
ページ(範囲)657-659
ページ数3
ジャーナルPhysica B: Condensed Matter
359-361
SPEC. ISS.
DOI
出版ステータスPublished - 2005 4月 30
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 電子工学および電気工学

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