Low-Temperature Dielectric Anisotropy Driven by an Antiferroelectric Mode in SrTiO3

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en
dc.contributor.author Casals, Blai
dc.contributor.author Schiaffino, Andrea
dc.contributor.author Casiraghi, Arianna
dc.contributor.author Hämäläinen, Sampo J.
dc.contributor.author López González, Diego
dc.contributor.author Van Dijken, Sebastiaan
dc.contributor.author Stengel, Massimiliano
dc.contributor.author Herranz, Gervasi
dc.date.accessioned 2018-06-25T08:19:01Z
dc.date.available 2018-06-25T08:19:01Z
dc.date.issued 2018-05-25
dc.identifier.citation Casals , B , Schiaffino , A , Casiraghi , A , Hämäläinen , S J , López González , D , Van Dijken , S , Stengel , M & Herranz , G 2018 , ' Low-Temperature Dielectric Anisotropy Driven by an Antiferroelectric Mode in SrTiO3 ' Physical Review Letters , vol 120 , no. 21 , 217601 , pp. 1-6 . DOI: 10.1103/PhysRevLett.120.217601 en
dc.identifier.issn 0031-9007
dc.identifier.issn 1079-7114
dc.identifier.other PURE UUID: d84198f0-6d99-45c0-a15f-58258795a548
dc.identifier.other PURE ITEMURL: https://research.aalto.fi/en/publications/lowtemperature-dielectric-anisotropy-driven-by-an-antiferroelectric-mode-in-srtio3(d84198f0-6d99-45c0-a15f-58258795a548).html
dc.identifier.other PURE LINK: http://www.scopus.com/inward/record.url?scp=85047743782&partnerID=8YFLogxK
dc.identifier.other PURE FILEURL: https://research.aalto.fi/files/25722047/PhysRevLett.120.217601.pdf
dc.identifier.uri https://aaltodoc.aalto.fi/handle/123456789/32092
dc.description | openaire: EC/FP7/307502/EU//E-CONTROL
dc.description.abstract Strontium titanate (SrTiO3) is the quintessential material for oxide electronics. One of its hallmark features is the transition, driven by antiferrodistortive (AFD) lattice modes, from a cubic to a ferroelastic low-temperature phase. Here we investigate the evolution of the ferroelastic twin walls upon application of an electric field. Remarkably, we find that the dielectric anisotropy of tetragonal SrTiO3, rather than the intrinsic domain wall polarity, is the main driving force for the motion of the twins. Based on a combined first-principles and Landau-theory analysis, we show that such anisotropy is dominated by a trilinear coupling between the polarization, the AFD lattice tilts, and a previously overlooked antiferroelectric (AFE) mode. We identify the latter AFE phonon with the so-called "R mode" at ∼440 cm-1, which was previously detected in IR experiments, but whose microscopic nature was unknown. en
dc.format.extent 1-6
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation info:eu-repo/grantAgreement/EC/FP7/307502/EU//E-CONTROL
dc.relation.ispartofseries Physical Review Letters en
dc.relation.ispartofseries Volume 120, issue 21 en
dc.rights openAccess en
dc.subject.other Physics and Astronomy(all) en
dc.subject.other 114 Physical sciences en
dc.title Low-Temperature Dielectric Anisotropy Driven by an Antiferroelectric Mode in SrTiO3 en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department CSIC
dc.contributor.department Department of Applied Physics
dc.contributor.department Nanomagnetism and Spintronics
dc.subject.keyword Physics and Astronomy(all)
dc.subject.keyword 114 Physical sciences
dc.identifier.urn URN:NBN:fi:aalto-201806253504
dc.identifier.doi 10.1103/PhysRevLett.120.217601
dc.type.version publishedVersion

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