Resonating Hartree-Fock Studies on Electron Correlation and Bond Alternation in the One Dimensional Half Filled Hubbard Model

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概要

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• Effects of the on-site electron-electron Coulomb interaction U on bond alternation in the one dimensional half filled Hubbard model are studied by the resonating Har-tree-Fock method. Two kinds of SDW neutral solitons S^0_A and S^0_B exist in a bond alternated lattice which are centered at a long bond and a short bond, respectively. S^0_A enhances but S^0_B suppresses the alternating bond order (ABO) due to bond alternation. Quantum fluctuations in the ground state involve more S^0_A's than S^0_B's because the former has lower energy than the latter with increasing bond alternation so that they enhance the ABO in the true ground state and consequently the bond alternation. The spin and singlet pair correlation functions show that electrons tend to make singlet pairs on nearest neighbor short bonds even from small U's and small bond alternations.

• 社団法人日本物理学会の論文
• 1993-12-15

著者

• FUKUTOME Hideo

  Department of Physics, Kyoto University

• Fukutome H

  Kyoto Univ. Kyoto

• Fukutome Hideo

  Department Of Physics Faculty Of Science Kyoto University

• IKAWA Atsushi

  Department of Physics,Kyoto University

• Tomita Norikazu

  Department of Physics, Faculty of Science, Kyoto University

• Ikawa A

  Kyoto Univ. Kyoto Jpn

• Ikawa Atsushi

  Department Of Chemistry Graduate School Of Science Kyoto University

• Tomita N

  Institute Of Materials Structure Science Kek

• IKAWA Atsushi

  Department of Chemistry, Graduate School of Science, Kyoto University

• FUKUTOME Hideo

  Department of Physics, Faculty of Science, Kyoto University

• FUKUTOME Hideo

  Department of Physics, Kyoto Unversity

• FUKUTOME Hideo

  Deoartment of Physics, Kyoto University

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