Exact ground states for quasi 1D systems with hubbard interaction

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Title	Exact ground states for quasi 1D systems with hubbard interaction
Authors	Kovacs, E. Gulacsi, Z.
ORCID
Keywords	strongly interacting systems hubbard model nanowires
Type	Conference Papers
Date of Issue	2011
URI	http://essuir.sumdu.edu.ua/handle/123456789/20658
Publisher	Sumy State University
License	Copyright not evaluated
Citation	Kovacs, E. Exact ground states for quasi 1D systems with hubbard interaction [Текст] / E. Kovacs, Z. Gulacsi // Nanomaterials: applications & properties. Proceedings : 1-st International conference, Alushta, Crimea, 27-30 Semptember 2011 / Edited by: A. Pogrebnjak, T. Lyutyy, S. Protsenko. — Sumy: Sumy State University, 2011. — V.2, P.І. — C. 171-175.
Abstract	Using a positive semidefinite operator technique we deduced exact ground states for a modified diamond chain described by a non-integrable Hubbard model with on-site repulsion. Our results are valid for arbitrary length of the chain and strength of the Hubbard interaction. For the analyzed quasi 1D chain structure we found that two flat bands are present in the bare band structure of the system, both for zero and for a fixed value of magnetic field. We obtained ground states of nonmagnetic and ferromagnetic insulator type and studied their physical properties. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/20658
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