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Article: Subdominant pairing channels in unconventional superconductors: Ginzburg-Landau theory

TitleSubdominant pairing channels in unconventional superconductors: Ginzburg-Landau theory
Authors
KeywordsPhysics
Issue Date1999
PublisherAmerican Physical Society. The Journal's web site is located at http://prb.aps.org/
Citation
Physical Review B - Condensed Matter And Materials Physics, 1999, v. 60 n. 22, p. 15364-15370 How to Cite?
AbstractA Ginzburg-Landau theory is developed for unconventional superconductors with the three relevant singlet pairing channels (i.e., s, d x2- y2, and d xy channels). Various consequences of the subdominant channels (i.e., s and d xy channels) are examined in detail. (1) In the case of a d x2- y2+is-wave superconductor, we reproduce an earlier result that there is a second-order zero-field transition from the pure d x2- y2 phase to the time-reversal-symmetry- (T-) breaking d x2- y2+is-phase at the temperature T DS. The structure of a single vortex above and below T DS is fourfold and twofold symmetric, respectively. (2) In the case of a d x2- y2+id xy-wave superconductor, there is also a second-order zero-field phase transition from the pure d x2- y2 phase to the T-breaking d x2- y2+id xy-wave phase at the temperature T DD′. In contrast to the case in a d x2- y2+is-wave superconductor, the subdominant phase cannot be induced by vortices above T DD′. Below the T-breaking transition, the subdominant phase in the mixed state is nontrivial: it survives at low fields, but may disappear above a field (increasing with decreasing temperature) presumably via a first-order transition. (3) By including the strong-coupling effects, a T-breaking-coupling term between the d x2- y2 and d xy waves is found to have significant effects on the low-temperature behavior of d x2- y2+id xy superconductors. In a magnetic field, a d x2- y2+id xy state is always established, but the field dependence of d xy amplitude above T DD′ is different from that below T DD′. Above but not very close to T DD′, the induced minimum gap Δ 0∝B/(T-T DD′). ©1999 The American Physical Society.
Persistent Identifierhttp://hdl.handle.net/10722/43278
ISSN
2001 Impact Factor: 3.07
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorWang, QHen_HK
dc.contributor.authorWang, ZDen_HK
dc.contributor.authorLi, Qen_HK
dc.date.accessioned2007-03-23T04:42:43Z-
dc.date.available2007-03-23T04:42:43Z-
dc.date.issued1999en_HK
dc.identifier.citationPhysical Review B - Condensed Matter And Materials Physics, 1999, v. 60 n. 22, p. 15364-15370en_HK
dc.identifier.issn0163-1829en_HK
dc.identifier.urihttp://hdl.handle.net/10722/43278-
dc.description.abstractA Ginzburg-Landau theory is developed for unconventional superconductors with the three relevant singlet pairing channels (i.e., s, d x2- y2, and d xy channels). Various consequences of the subdominant channels (i.e., s and d xy channels) are examined in detail. (1) In the case of a d x2- y2+is-wave superconductor, we reproduce an earlier result that there is a second-order zero-field transition from the pure d x2- y2 phase to the time-reversal-symmetry- (T-) breaking d x2- y2+is-phase at the temperature T DS. The structure of a single vortex above and below T DS is fourfold and twofold symmetric, respectively. (2) In the case of a d x2- y2+id xy-wave superconductor, there is also a second-order zero-field phase transition from the pure d x2- y2 phase to the T-breaking d x2- y2+id xy-wave phase at the temperature T DD′. In contrast to the case in a d x2- y2+is-wave superconductor, the subdominant phase cannot be induced by vortices above T DD′. Below the T-breaking transition, the subdominant phase in the mixed state is nontrivial: it survives at low fields, but may disappear above a field (increasing with decreasing temperature) presumably via a first-order transition. (3) By including the strong-coupling effects, a T-breaking-coupling term between the d x2- y2 and d xy waves is found to have significant effects on the low-temperature behavior of d x2- y2+id xy superconductors. In a magnetic field, a d x2- y2+id xy state is always established, but the field dependence of d xy amplitude above T DD′ is different from that below T DD′. Above but not very close to T DD′, the induced minimum gap Δ 0∝B/(T-T DD′). ©1999 The American Physical Society.en_HK
dc.format.extent173805 bytes-
dc.format.extent45056 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 and Materials Physicsen_HK
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.rightsPhysical Review B (Condensed Matter and Materials Physics). Copyright © American Physical Society.en_HK
dc.subjectPhysicsen_HK
dc.titleSubdominant pairing channels in unconventional superconductors: Ginzburg-Landau theoryen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1098-0121&volume=60&issue=22&spage=15364&epage=15370&date=1999&atitle=Subdominant+pairing+channels+in+unconventional+superconductors:+Ginzburg-Landau+theoryen_HK
dc.identifier.emailWang, ZD: zwang@hkucc.hku.hken_HK
dc.identifier.authorityWang, ZD=rp00802en_HK
dc.description.naturepublished_or_final_versionen_HK
dc.identifier.doi10.1103/PhysRevB.60.15364en_HK
dc.identifier.scopuseid_2-s2.0-0001473130en_HK
dc.identifier.hkuros47466-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0001473130&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume60en_HK
dc.identifier.issue22en_HK
dc.identifier.spage15364en_HK
dc.identifier.epage15370en_HK
dc.identifier.isiWOS:000084631600055-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridWang, QH=7406916485en_HK
dc.identifier.scopusauthoridWang, ZD=14828459100en_HK
dc.identifier.scopusauthoridLi, Q=7405860215en_HK

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