Nonperturbative Ferromagnetism in the Hubbard Model for Quarter-Filling with One Extra Electron

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概要

• 論文の詳細を見る

• We present a Htrb bard model with a special hopping matrix, which has highly degenerate single-electron energy eigenstates but has different properties than the flat-band Hubbard model. Ourmodel has a paramagnetic ground state when the electron filling factor is less than or equal toquarter-filling. In the case of qtrarter-filling xvitla one extra electron, the present model exhibitssaturated ferromagnetism in the grotrnd states for a sufficiently large valtre of on-site Coulounbinteraction btrt does not ['or a small one.

• 社団法人日本物理学会の論文
• 1998-02-15

著者

• Tanaka Akinori

  Department Of Physics Graduate School Of Science Tohoku University

• Tanaka A

  Department Of Applied Science Faculty Of Engineering Kyushu University

• IDOGAKI Toshihiro

  Department of Applied Science,Faculty of Engineering,Kyushu University

• Tanaka Akinori

  Department Of Applied Quantum Physics Kyushu University

• Idogaki Toshihiro

  Department Of Applied Scienc Faculty Of Engineering Kyushu University

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