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2009 | 115 | 1 | 98-100
Article title

The Role of the Exchange Interaction in the One-Dimensional n-Component Hubbard Model

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EN
Abstracts
EN
The commensurate p/q-filled n-component Hubbard chain was investigated by bosonization and high-precision density-matrix renormalization-group analysis. It was found that depending on the relation between the number of components n, and the filling parameter q, the system shows metallic or insulating behavior, and for special fillings bond-ordered (dimerized, trimerized, tetramerized etc.) ground state develops in the insulating phase. A mean-field analysis shows that this bond ordering is a direct consequence of the spin-exchange interaction, which plays a crucial role in the one-parameter Hubbard model - not only for infinite Coulomb repulsion, but for intermediate values as well.
Keywords
EN
Publisher

Year
Volume
115
Issue
1
Pages
98-100
Physical description
Dates
published
2009-01
Contributors
author
  • Research Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, Hungary
author
  • Research Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, Hungary
author
  • Research Institute for Solid State Physics and Optics, P.O. Box 49, H-1525 Budapest, Hungary
References
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Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv115n1020kz
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