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...
Saved in:
| Published in: | Condensed Matter Physics |
|---|---|
| Date: | 2010 |
| Main Authors: | , |
| Format: | Article |
| Language: | English |
| Published: |
Інститут фізики конденсованих систем НАН України
2010
|
| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/32048 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | 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. |
Institution
Digital Library of Periodicals of National Academy of Sciences of Ukraine| id |
nasplib_isofts_kiev_ua-123456789-32048 |
|---|---|
| record_format |
dspace |
| 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 |
| institution |
Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| collection |
DSpace DC |
| title |
Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| spellingShingle |
Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain Rössler, J. Mainemer, D. |
| title_short |
Ferrimagnetism in the Hubbard, dimmer-connector frustrated chain |
| 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_sort |
ferrimagnetism in the hubbard, dimmer-connector frustrated chain |
| author |
Rössler, J. Mainemer, D. |
| author_facet |
Rössler, J. Mainemer, D. |
| publishDate |
2010 |
| language |
English |
| container_title |
Condensed Matter Physics |
| publisher |
Інститут фізики конденсованих систем НАН України |
| format |
Article |
| title_alt |
Феримагнетизм у димер-конекторному фрустрованому ланцюжку Габбарда |
| 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.
|
| issn |
1607-324X |
| url |
https://nasplib.isofts.kiev.ua/handle/123456789/32048 |
| 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. |
| work_keys_str_mv |
AT rosslerj ferrimagnetisminthehubbarddimmerconnectorfrustratedchain AT mainemerd ferrimagnetisminthehubbarddimmerconnectorfrustratedchain AT rosslerj ferimagnetizmudimerkonektornomufrustrovanomulancûžkugabbarda AT mainemerd ferimagnetizmudimerkonektornomufrustrovanomulancûžkugabbarda |
| first_indexed |
2025-12-07T17:19:11Z |
| last_indexed |
2025-12-07T17:19:11Z |
| _version_ |
1850870806462070784 |