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Article: Spin density wave and ferromagnetism in a quasi-one-dimensional organic polymer

TitleSpin density wave and ferromagnetism in a quasi-one-dimensional organic polymer
Authors
Issue Date1997
PublisherSpringer Verlag. The Journal's web site is located at http://www.edpsciences.org/journal/index.cfm?edpsname=epjb
Citation
Zeitschrift Fur Physik B-Condensed Matter, 1997, v. 104 n. 1, p. 27-32 How to Cite?
AbstractThe spin density wave(SDW) - charge density wave(CDW) phase transition and the magnetic properties in a half-filled quasi-one-dimensional organic polymer are investigated by the world line Monte Carlo simulations. The itinerant TT electrons moving along the polymer chain are coupled radically to localized unpaired d electrons, which are situated at every other site of the polymer chain. The results show that both ferromagnetic and anti-ferromagnetic radical couplings enhance the SDW phase and the ferromagnet order of the radical spins, but suppress the CDW phase. By finite size scaling, we are able to obtain the phase transition line in the parameter space. The ferromagnetic order of the radical spins are observed to coexist with the SDW phase. As compared to the system being free of the radical coupling, the phase transition line is shifted upward in the U-V parameter space in favor of larger V, where U is the on-site repulsion and V is the nearest-neighbor interaction between the TT electrons. All of these findings can be understood qualitatively by a second-order perturbation theory starting from the classical state at zero temperature in the strong coupling limit. We also address the consequences of the radical coupling for the persistent current if the polymer chain is fabricated as a mesoscopic ring. © Springer-Verlag 1997.
Persistent Identifierhttp://hdl.handle.net/10722/80408
ISSN
1999 Impact Factor: 1.727
2000 SCImago Journal Rankings: 1.637
References

 

DC FieldValueLanguage
dc.contributor.authorLiang, SDen_HK
dc.contributor.authorWang, Qen_HK
dc.contributor.authorWang, ZDen_HK
dc.date.accessioned2010-09-06T08:06:08Z-
dc.date.available2010-09-06T08:06:08Z-
dc.date.issued1997en_HK
dc.identifier.citationZeitschrift Fur Physik B-Condensed Matter, 1997, v. 104 n. 1, p. 27-32en_HK
dc.identifier.issn0722-3277en_HK
dc.identifier.urihttp://hdl.handle.net/10722/80408-
dc.description.abstractThe spin density wave(SDW) - charge density wave(CDW) phase transition and the magnetic properties in a half-filled quasi-one-dimensional organic polymer are investigated by the world line Monte Carlo simulations. The itinerant TT electrons moving along the polymer chain are coupled radically to localized unpaired d electrons, which are situated at every other site of the polymer chain. The results show that both ferromagnetic and anti-ferromagnetic radical couplings enhance the SDW phase and the ferromagnet order of the radical spins, but suppress the CDW phase. By finite size scaling, we are able to obtain the phase transition line in the parameter space. The ferromagnetic order of the radical spins are observed to coexist with the SDW phase. As compared to the system being free of the radical coupling, the phase transition line is shifted upward in the U-V parameter space in favor of larger V, where U is the on-site repulsion and V is the nearest-neighbor interaction between the TT electrons. All of these findings can be understood qualitatively by a second-order perturbation theory starting from the classical state at zero temperature in the strong coupling limit. We also address the consequences of the radical coupling for the persistent current if the polymer chain is fabricated as a mesoscopic ring. © Springer-Verlag 1997.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag. The Journal's web site is located at http://www.edpsciences.org/journal/index.cfm?edpsname=epjben_HK
dc.relation.ispartofZeitschrift fur Physik B-Condensed Matteren_HK
dc.titleSpin density wave and ferromagnetism in a quasi-one-dimensional organic polymeren_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0722-3277&volume=104&spage=27&epage=32&date=1997&atitle=Spin+Density+Wave+and+Ferromagnetism+in+a+Quasi-One-Dimensional+Organic+Polymeren_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0002009333en_HK
dc.identifier.hkuros28705en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0002009333&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume104en_HK
dc.identifier.issue1en_HK
dc.identifier.spage27en_HK
dc.identifier.epage32en_HK
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridLiang, SD=36813644000en_HK
dc.identifier.scopusauthoridWang, Q=7406916485en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK

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