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Article: Mott insulator-superfluid transitions in a two-band model at finite temperature and possible application to supersolid He4
Title | Mott insulator-superfluid transitions in a two-band model at finite temperature and possible application to supersolid He4 |
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Authors | |
Keywords | Physics |
Issue Date | 2007 |
Publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ |
Citation | Physical Review B (Condensed Matter and Materials Physics), 2007, v. 76 n. 17, article no. 174504 How to Cite? |
Abstract | We study the Mott insulator-superfluid transition in a two-band boson Hubbard model, which can be mapped onto a spin- 1 2 XY model with spins coupled to an additional Ising degree of freedom. By using a modified mean field theory that includes the effects of phase fluctuations, we show that the transition is first order at both zero and finite temperatures. On the Mott insulator side, there may be reentrance in phase transition. These features are consequences of the underlying transition between competing defect poor and defect rich phases. The possible relevance of the model and our results to supersolid He4 and cold bosonic atoms in optical lattices are discussed. © 2007 The American Physical Society. |
Persistent Identifier | http://hdl.handle.net/10722/57329 |
ISSN | 2014 Impact Factor: 3.736 |
ISI Accession Number ID | |
References |
DC Field | Value | Language |
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dc.contributor.author | Zhuang, HB | en_HK |
dc.contributor.author | Ma, M | en_HK |
dc.contributor.author | Dai, X | en_HK |
dc.contributor.author | Zhang, FC | en_HK |
dc.date.accessioned | 2010-04-12T01:33:18Z | - |
dc.date.available | 2010-04-12T01:33:18Z | - |
dc.date.issued | 2007 | en_HK |
dc.identifier.citation | Physical Review B (Condensed Matter and Materials Physics), 2007, v. 76 n. 17, article no. 174504 | - |
dc.identifier.issn | 1098-0121 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/57329 | - |
dc.description.abstract | We study the Mott insulator-superfluid transition in a two-band boson Hubbard model, which can be mapped onto a spin- 1 2 XY model with spins coupled to an additional Ising degree of freedom. By using a modified mean field theory that includes the effects of phase fluctuations, we show that the transition is first order at both zero and finite temperatures. On the Mott insulator side, there may be reentrance in phase transition. These features are consequences of the underlying transition between competing defect poor and defect rich phases. The possible relevance of the model and our results to supersolid He4 and cold bosonic atoms in optical lattices are discussed. © 2007 The American Physical Society. | en_HK |
dc.language | eng | en_HK |
dc.publisher | American Physical Society. The Journal's web site is located at http://prb.aps.org/ | en_HK |
dc.relation.ispartof | Physical Review B (Condensed Matter and Materials Physics) | - |
dc.rights | Copyright 2007 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.76.174504 | - |
dc.subject | Physics | en_HK |
dc.title | Mott insulator-superfluid transitions in a two-band model at finite temperature and possible application to supersolid He4 | en_HK |
dc.type | Article | en_HK |
dc.identifier.openurl | http://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=76&issue=17&spage=174504&epage=1 &date=2007&atitle=Mott+insulator-superfluid+transitions+in+a+two-band+model+at+finite+temperature+and+possible+application+to+supersolid+4He | en_HK |
dc.identifier.email | Zhang, FC: fuchun@hkucc.hku.hk | en_HK |
dc.identifier.authority | Zhang, FC=rp00840 | en_HK |
dc.description.nature | published_or_final_version | en_HK |
dc.identifier.doi | 10.1103/PhysRevB.76.174504 | en_HK |
dc.identifier.scopus | eid_2-s2.0-35948999612 | en_HK |
dc.identifier.hkuros | 152368 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-35948999612&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 76 | en_HK |
dc.identifier.issue | 17 | en_HK |
dc.identifier.spage | article no. 174504 | - |
dc.identifier.epage | article no. 174504 | - |
dc.identifier.isi | WOS:000251326600106 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Zhuang, HB=36880044700 | en_HK |
dc.identifier.scopusauthorid | Ma, M=7202445040 | en_HK |
dc.identifier.scopusauthorid | Dai, X=55237280400 | en_HK |
dc.identifier.scopusauthorid | Zhang, FC=14012468800 | en_HK |
dc.identifier.issnl | 1098-0121 | - |