Exact Bond-Located Spin Ground State in the Hubbard Chain with Off-Diagonal Coulomb Interactions : Condensed Matter: Electronic Properties, etc.

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概要

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• We show the existence of an exact ground state in a parameter regime of a one-dimensional half-filled extended Hubbard model with site-off-diagonal interactions. In this ground state, the bond-located spin correlation exhibits a long-range order. In the case when the spin space is SU(2) symmetric, this ground state degenerates with higher spin states including a fully ferromagnetic state. We also discuss the relation between the exact bond-ordered ground state and the critical bond-spin-density-wave phase.

• 社団法人日本物理学会の論文
• 2001-05-15

著者

• Itoh Kazuhito

  Institute For Solid State Physics University Of Tokyo

• NAKAMURA Masaaki

  Max-Planck-Institut fur Physik komplexer Systeme, Nothnitzer Straβe 38

• MURAMOTO Norihiro

  Institute for Solid State Physics, University of Tokyo

• Muramoto Norihiro

  Institute For Solid State Physics University Of Tokyo:(present) Edogawa Girls' Junior And Senio

• Nakamura Masaaki

  Max-planck-institut Fur Physik Komplexer Systeme

• Nakamura Masaaki

  Max-planck-institut Fur Physik Komplexer Systeme Nothnitzer Straβe 38:(present) Department Of Applie

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• Exact Ground States in Spin Systems with Orbital Degeneracy
• Role of Bond-Bond Interaction in the Extended Hubbard Chain
• Exact Bond-Located Spin Ground State in the Hubbard Chain with Off-Diagonal Coulomb Interactions : Condensed Matter: Electronic Properties, etc.
• Integrable Magnetic Model of Two Chains Coupled by Four-Body Interactions

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