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Article: Percolative conductivity and critical exponents in mixed-valent manganites

TitlePercolative conductivity and critical exponents in mixed-valent manganites
Authors
Xiong, YShen, SQXie, XC
KeywordsPhysics
Issue Date2001
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B (Condensed Matter), 2001, v. 63 n. 14, article no. 140418 , p. 1-4 How to Cite?
DOI: http://dx.doi.org/10.1103/PhysRevB.63.140418
AbstractRecent experiments have shown that some colossal magnetoresistance (CMR) materials exhibit a percolation transition. The conductivity exponent varies substantially with or without an external magnetic field. This finding prompted us to carry out theoretical studies of percolation transition in CMR systems. We find that the percolation transition coincides with the magnetic transition, and therefore the magnetic field has a large effect on the percolation transition. Using a real-space-renormalization method and numerical calculations for two-dimensional (2D) and three-dimensional (3D) models, we obtain the conductivity exponent t to be 5.3 (3D) and 3.3 (2D) without a magnetic field, and 1.7 (3D) and 1.4 (2D) with a magnetic field.
Persistent Identifierhttp://hdl.handle.net/10722/43315
ISSN
0163-1829
ISI Accession Number ID
WOS:000168059800019
References
References in Scopus

 

DC FieldValueLanguage
dc.contributor.authorXiong, Yen_HK
dc.contributor.authorShen, SQen_HK
dc.contributor.authorXie, XCen_HK
dc.date.accessioned2007-03-23T04:43:25Z-
dc.date.available2007-03-23T04:43:25Z-
dc.date.issued2001en_HK
dc.identifier.citationPhysical Review B (Condensed Matter), 2001, v. 63 n. 14, article no. 140418 , p. 1-4-
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43315-
dc.description.abstractRecent experiments have shown that some colossal magnetoresistance (CMR) materials exhibit a percolation transition. The conductivity exponent varies substantially with or without an external magnetic field. This finding prompted us to carry out theoretical studies of percolation transition in CMR systems. We find that the percolation transition coincides with the magnetic transition, and therefore the magnetic field has a large effect on the percolation transition. Using a real-space-renormalization method and numerical calculations for two-dimensional (2D) and three-dimensional (3D) models, we obtain the conductivity exponent t to be 5.3 (3D) and 3.3 (2D) without a magnetic field, and 1.7 (3D) and 1.4 (2D) with a magnetic field.en_HK
dc.format.extent71610 bytes-
dc.format.extent34304 bytes-
dc.format.mimetypeapplication/pdf-
dc.format.mimetypeapplication/msword-
dc.languageengen_HK
dc.publisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/en_HK
dc.relation.ispartofPhysical Review B (Condensed Matter)-
dc.rightsCopyright 2001 by The American Physical Society. This article is available online at https://doi.org/10.1103/PhysRevB.63.140418-
dc.subjectPhysicsen_HK
dc.titlePercolative conductivity and critical exponents in mixed-valent manganitesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=63&issue=14&spage=140418:1&epage=4&date=2001&atitle=Percolative+conductivity+and+critical+exponents+in+mixed-valent+manganitesen_HK
dc.identifier.emailShen, SQ: sshen@hkucc.hku.hken_HK
dc.identifier.authorityShen, SQ=rp00775en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.63.140418en_HK
dc.identifier.scopuseid_2-s2.0-0034894935en_HK
dc.identifier.hkuros56601-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0034894935&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume63en_HK
dc.identifier.issue14en_HK
dc.identifier.spagearticle no. 140418, p. 1-
dc.identifier.epagearticle no. 140418, p. 4-
dc.identifier.isiWOS:000168059800019-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridXiong, Y=36951092300en_HK
dc.identifier.scopusauthoridShen, SQ=7403431266en_HK
dc.identifier.scopusauthoridXie, XC=13502915800en_HK
dc.identifier.issnl0163-1829-

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