Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain
We study the AB2 "dimmer-connector" chain within a generalized Hubbard model, which contains site-dependent parameters, and different chemical potentials for A and B sites. Considering one electron per atom, we carry out exact calculations for finite clusters, and derive some asymptotic re...
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| Veröffentlicht in: | Condensed Matter Physics |
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| Datum: | 2010 |
| Hauptverfasser: | , |
| Format: | Artikel |
| Sprache: | Englisch |
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Інститут фізики конденсованих систем НАН України
2010
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| Online Zugang: | https://nasplib.isofts.kiev.ua/handle/123456789/32048 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Zitieren: | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain / J. Rössler, D. Mainemer // Condensed Matter Physics. — 2010. — Т. 13, № 1. — С. 13704: 1-8. — Бібліогр.: 15 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862709661274210304 |
|---|---|
| author | Rössler, J. Mainemer, D. |
| author_facet | Rössler, J. Mainemer, D. |
| citation_txt | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain / J. Rössler, D. Mainemer // Condensed Matter Physics. — 2010. — Т. 13, № 1. — С. 13704: 1-8. — Бібліогр.: 15 назв. — англ. |
| collection | DSpace DC |
| container_title | Condensed Matter Physics |
| description | We study the AB2 "dimmer-connector" chain within a generalized Hubbard model, which contains site-dependent parameters, and different chemical potentials for A and B sites. Considering one electron per atom, we carry out exact calculations for finite clusters, and derive some asymptotic results, valid for macroscopic chains. We take a non-vanishing intra-dimmer electron hopping, thus departing from the condition of a bipartite lattice. In spite of that, the system persists ferrimagnetic in some region of the parameter space, thus generalizing a theorem of Lieb for bipartite lattices. A somewhat surprising result is that the ferrimagnetic phase is possible, even for a very large chemical potential jump between A and B sites. In another respect, we show that a previously reported macroscopic (2N) degenerancy of the AB2 Heisenberg chain ground state (GS) is fully removed on going to the (more fundamental) Hubbard model, yielding a non-magnetic GS.
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| first_indexed | 2025-12-07T17:19:11Z |
| format | Article |
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| id | nasplib_isofts_kiev_ua-123456789-32048 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 1607-324X |
| language | English |
| last_indexed | 2025-12-07T17:19:11Z |
| publishDate | 2010 |
| publisher | Інститут фізики конденсованих систем НАН України |
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| spelling | Rössler, J. Mainemer, D. 2012-04-06T18:01:58Z 2012-04-06T18:01:58Z 2010 Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain / J. Rössler, D. Mainemer // Condensed Matter Physics. — 2010. — Т. 13, № 1. — С. 13704: 1-8. — Бібліогр.: 15 назв. — англ. 1607-324X PACS: 73.90.+f, 75.10.Lp, 75.10--75.25 https://nasplib.isofts.kiev.ua/handle/123456789/32048 We study the AB2 "dimmer-connector" chain within a generalized Hubbard model, which contains site-dependent parameters, and different chemical potentials for A and B sites. Considering one electron per atom, we carry out exact calculations for finite clusters, and derive some asymptotic results, valid for macroscopic chains. We take a non-vanishing intra-dimmer electron hopping, thus departing from the condition of a bipartite lattice. In spite of that, the system persists ferrimagnetic in some region of the parameter space, thus generalizing a theorem of Lieb for bipartite lattices. A somewhat surprising result is that the ferrimagnetic phase is possible, even for a very large chemical potential jump between A and B sites. In another respect, we show that a previously reported macroscopic (2N) degenerancy of the AB2 Heisenberg chain ground state (GS) is fully removed on going to the (more fundamental) Hubbard model, yielding a non-magnetic GS. en Інститут фізики конденсованих систем НАН України Condensed Matter Physics Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain Феримагнетизм у димер-конекторному фрустрованому ланцюжку Габбарда Article published earlier |
| spellingShingle | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain Rössler, J. Mainemer, D. |
| title | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| title_alt | Феримагнетизм у димер-конекторному фрустрованому ланцюжку Габбарда |
| title_full | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| title_fullStr | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| title_full_unstemmed | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| title_short | Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| title_sort | ferrimagnetism in the hubbard, dimmer-connector frustrated chain |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/32048 |
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