The Fundamental Mechanism Behind Colossal Permittivity in Oxides (article)
dc.contributor.author | Taylor, NT | |
dc.contributor.author | Davies, FH | |
dc.contributor.author | Davies, SG | |
dc.contributor.author | Price, CJ | |
dc.contributor.author | Hepplestone, SP | |
dc.date.accessioned | 2019-10-22T12:30:50Z | |
dc.date.issued | 2019-10-21 | |
dc.description.abstract | Colossal permittivity materials exhibit extreme polarization in an applied electric field, providing applications in electronics and energy transmission. Understanding the atomic‐scale mechanism behind colossal permittivity remains a challenging task and is key to optimizing materials with this property. The fundamental mechanism of colossal permittivity is reported and, using CaCu3Ti4O12 as an example, it is attributed to the formation of an unusual metallic interface between the grain and grain boundary materials (CaCu3Ti4O12 and CuxO (x = 1, 2), respectively), not created by oxygen vacancies as is normally the case in oxide materials. This metallic layer around the grain forms confined shells of charge that pool on one side when under an applied field, which results in colossal permittivity. A route towards enhancing colossal permittivity is explained by means of manipulating the interface properties, as well as altering sample geometries. A methodology to artificially engineer colossal permittivity metamaterials is also shown. | en_GB |
dc.description.sponsorship | Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
dc.identifier.citation | Article 1904746 | en_GB |
dc.identifier.doi | 10.1002/adma.201904746 | |
dc.identifier.grantnumber | EP/L000202 | en_GB |
dc.identifier.grantnumber | EP/R029431 | en_GB |
dc.identifier.grantnumber | EP/L015331/1 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/39298 | |
dc.language.iso | en | en_GB |
dc.publisher | Wiley | en_GB |
dc.relation.url | https://doi.org/10.24378/exe.2123 | en_GB |
dc.rights | © 2019 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. | en_GB |
dc.subject | calcium copper titanate | en_GB |
dc.subject | CCTO | en_GB |
dc.subject | colossal permittivity | en_GB |
dc.subject | copper | en_GB |
dc.subject | first‐principles calculations | en_GB |
dc.subject | titanate | en_GB |
dc.title | The Fundamental Mechanism Behind Colossal Permittivity in Oxides (article) | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2019-10-22T12:30:50Z | |
dc.identifier.issn | 0935-9648 | |
dc.description | This is the final version. Available on open access from Wiley via the DOI in this record | en_GB |
dc.description | The dataset associated with this article is located in ORE at: https://doi.org/10.24378/exe.2123 | en_GB |
dc.identifier.journal | Advanced Materials | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
exeter.funder | ::Engineering and Physical Sciences Research Council (EPSRC) | en_GB |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2019-10-21 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2019-10-22T12:23:42Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2019-10-22T12:30:57Z | |
refterms.panel | B | en_GB |
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Except where otherwise noted, this item's licence is described as © 2019 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.