The origin of incipient ferroelectricity in lead telluride

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dc.contributor.authorJiang, M. P.
dc.contributor.authorTrigo, M.
dc.contributor.authorSavić, Ivana
dc.contributor.authorFahy, Stephen B.
dc.contributor.authorMurray, Éamonn D.
dc.contributor.authorBray, C.
dc.contributor.authorClark, J.
dc.contributor.authorHenighan, T.
dc.contributor.authorKozina, M.
dc.contributor.authorChollet, Matthieu
dc.contributor.authorGlownia, J. M.
dc.contributor.authorHoffmann, M. C.
dc.contributor.authorZhu, D.
dc.contributor.authorDelaire, O.
dc.contributor.authorMay, A. F.
dc.contributor.authorSales, B. C.
dc.contributor.authorLindenberg, Aaron M.
dc.contributor.authorZalden, P.
dc.contributor.authorSato, T.
dc.contributor.authorMerlin, R.
dc.contributor.authorReis, D. A.
dc.contributor.funderU.S. Department of Energyen
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderH2020 Marie Skłodowska-Curie Actionsen
dc.contributor.funderEuropean Commissionen
dc.contributor.funderVolkswagen Foundation, Germanyen
dc.date.accessioned2017-06-28T15:25:57Z
dc.date.available2017-06-28T15:25:57Z
dc.date.issued2016-07-22
dc.date.updated2017-06-28T15:13:35Z
dc.description.abstractThe interactions between electrons and lattice vibrations are fundamental to materials behaviour. In the case of group IV–VI, V and related materials, these interactions are strong, and the materials exist near electronic and structural phase transitions. The prototypical example is PbTe whose incipient ferroelectric behaviour has been recently associated with large phonon anharmonicity and thermoelectricity. Here we show that it is primarily electron-phonon coupling involving electron states near the band edges that leads to the ferroelectric instability in PbTe. Using a combination of nonequilibrium lattice dynamics measurements and first principles calculations, we find that photoexcitation reduces the Peierls-like electronic instability and reinforces the paraelectric state. This weakens the long-range forces along the cubic direction tied to resonant bonding and low lattice thermal conductivity. Our results demonstrate how free-electron-laser-based ultrafast X-ray scattering can be utilized to shed light on the microscopic mechanisms that determine materials properties.en
dc.description.sponsorshipUnited States Department of Energy (Office of Science, Basic Energy Sciences, Materials Sciences and Engineering Division, under Contract DE-AC02-76SF00515; Early Career Research Program); Science Foundation Ireland (Grant No. 12/1A/1601) Science Foundation Ireland and Marie Curie Action COFUND (Starting Investigator Research Grant 11/SIRG/E2113); Volkswagen Foundationen
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationJiang, M. P., Trigo, M., Savić, I., Fahy, S., Murray, É. D., Bray, C., Clark, J., Henighan, T., Kozina, M., Chollet, M., Glownia, J. M., Hoffmann, M. C., Zhu, D., Delaire, O., May, A. F., Sales, B. C., Lindenberg, A. M., Zalden, P., Sato, T., Merlin, R. and Reis, D. A. (2016) 'The origin of incipient ferroelectricity in lead telluride', 7, 12291. doi:10.1038/ncomms12291en
dc.identifier.doi10.1038/ncomms12291
dc.identifier.endpage12291-9en
dc.identifier.issn2041-1723
dc.identifier.journaltitleNature Communicationsen
dc.identifier.startpage12291-1en
dc.identifier.urihttps://hdl.handle.net/10468/4202
dc.identifier.volume7en
dc.language.isoenen
dc.publisherNature Publishing Groupen
dc.rights© The Authors 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.subjectElectronic properties and materialsen
dc.subjectFerroelectrics and multiferroicsen
dc.subjectPhase transitions and critical phenomenaen
dc.titleThe origin of incipient ferroelectricity in lead tellurideen
dc.typeArticle (peer-reviewed)en
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