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  Coherent potential approximation for charge ordering in the extended Hubbard model

Hoang, A. T., & Thalmeier, P. (2002). Coherent potential approximation for charge ordering in the extended Hubbard model. Journal of Physics-Condensed Matter, 14(26), 6639-6646. doi:10.1088/0953-8984/14/26/304.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0015-312B-8 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0017-DEBD-A
Genre: Journal Article

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 Creators:
Hoang, A. T., Author
Thalmeier, P.1, Author              
Affiliations:
1Peter Thalmeier, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863457              

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 Abstract: We study charge ordering (CO) in the extended Hubbard model with both on-site and nearest-neighbour Coulomb repulsion (U and V, respectively) within the coherent potential approximation. The phase boundary between the homogeneous and charge-ordered phases for the square lattice is obtained for different values of U. It is shown that at quarter-filling for all values of U the CO exists only if the inter-site Coulomb repulsion V exceeds certain a critical value which is of the order of the kinetic energy t. At finite temperature a re- entrant transition is found in some region of V.

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Language(s): eng - English
 Dates: 2002-07-08
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Method: Peer
 Identifiers: eDoc: 17358
ISI: 000177223100007
DOI: 10.1088/0953-8984/14/26/304
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Title: Journal of Physics-Condensed Matter
  Alternative Title : J. Phys.-Condes. Matter
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 14 (26) Sequence Number: - Start / End Page: 6639 - 6646 Identifier: ISSN: 0953-8984