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Title | Exact Ground States for Quasi 1D Systems with Hubbard Interaction |
Authors |
Kovács, E.
Gulácsi, Zs. |
ORCID | |
Keywords |
Strongly interacting systems Hubbard model Ferromagnetism Nanowires |
Type | Article |
Date of Issue | 2012 |
URI | http://essuir.sumdu.edu.ua/handle/123456789/24886 |
Publisher | Видавництво СумДУ |
License | |
Citation | E. Kovács, Zs. Gulácsi, J. Nano-Electron. Phys. 4 No 1, 01004 (2012) |
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 parameter space region of the 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/123456789/24886 |
Appears in Collections: |
Журнал нано- та електронної фізики (Journal of nano- and electronic physics) |
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File | Size | Format | Downloads |
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Kovács.pdf | 522,68 kB | Adobe PDF | 112552286 |
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