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Article: Electron-phonon coupling in BaFe2As2: A possible origin of nematic phase

TitleElectron-phonon coupling in BaFe<inf>2</inf>As<inf>2</inf>: A possible origin of nematic phase
Authors
KeywordsBaFe As 2 2
Electron-phonon coupling
Nematic phase
Raman scattering
Issue Date2015
Citation
Physica C: Superconductivity and its Applications, 2015, v. 519, p. 164-167 How to Cite?
Abstract� 2015 Elsevier B.V. All rights reserved. Iron-based superconductors have the second-highest superconducting transition temperature next to cuprate superconductors. There are many electronic phases such as superconducting, antiferromagnetic and nematic phases, coexisting in the family of iron pnictides. The charge/spin orders are the key factors for understanding the mechanism of high-temperature superconductivity. In this paper we have performed a Raman scattering study of parent compound BaFe 2 As 2 . A relatively strong electron-phonon coupling is observed for B 1g phonon mode and is weakened after the structural transition at ∼140 K. Through a careful symmetry analysis, we revealed the possibility that B 1g mode can be effectively coupled with d xz and d yz orbits. The coupling can remove the degeneracy of the two orbits and further cause the fluctuations of electronic nematic phases. The study suggests that electron-phonon coupling can be a possible origin of nematic phase.
Persistent Identifierhttp://hdl.handle.net/10722/254448
ISSN
2015 Impact Factor: 0.835
2015 SCImago Journal Rankings: 0.472

 

DC FieldValueLanguage
dc.contributor.authorZhang, Anmin-
dc.contributor.authorJi, Jianting-
dc.contributor.authorXia, Tianlong-
dc.contributor.authorZhao, Guihua-
dc.contributor.authorTian, Yong-
dc.contributor.authorJin, Feng-
dc.contributor.authorZhang, Qingming-
dc.date.accessioned2018-06-19T15:40:34Z-
dc.date.available2018-06-19T15:40:34Z-
dc.date.issued2015-
dc.identifier.citationPhysica C: Superconductivity and its Applications, 2015, v. 519, p. 164-167-
dc.identifier.issn0921-4534-
dc.identifier.urihttp://hdl.handle.net/10722/254448-
dc.description.abstract� 2015 Elsevier B.V. All rights reserved. Iron-based superconductors have the second-highest superconducting transition temperature next to cuprate superconductors. There are many electronic phases such as superconducting, antiferromagnetic and nematic phases, coexisting in the family of iron pnictides. The charge/spin orders are the key factors for understanding the mechanism of high-temperature superconductivity. In this paper we have performed a Raman scattering study of parent compound BaFe 2 As 2 . A relatively strong electron-phonon coupling is observed for B 1g phonon mode and is weakened after the structural transition at ∼140 K. Through a careful symmetry analysis, we revealed the possibility that B 1g mode can be effectively coupled with d xz and d yz orbits. The coupling can remove the degeneracy of the two orbits and further cause the fluctuations of electronic nematic phases. The study suggests that electron-phonon coupling can be a possible origin of nematic phase.-
dc.languageeng-
dc.relation.ispartofPhysica C: Superconductivity and its Applications-
dc.subjectBaFe As 2 2-
dc.subjectElectron-phonon coupling-
dc.subjectNematic phase-
dc.subjectRaman scattering-
dc.titleElectron-phonon coupling in BaFe<inf>2</inf>As<inf>2</inf>: A possible origin of nematic phase-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.physc.2015.10.008-
dc.identifier.scopuseid_2-s2.0-84946915655-
dc.identifier.volume519-
dc.identifier.spage164-
dc.identifier.epage167-

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