Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices

Based on the Landau-Ginzburg theory, the screening charge compensation phenomena for polarization discontinuities at interface in ferroelectric superlattices are investigated. Interface mixing leads to polarization continuity or discontinuity in superlattices. Free charge with equal but of opposite...

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Main Authors:	Lim, K.G., Chew, K.H., Wang, D.Y., Ong, L.H., Iwata, M.
Format:	Article
Published:	EPL Association, European Physical Society 2014
Subjects:	Q Science (General)
Online Access:	http://eprints.um.edu.my/15499/

id	um-15499
recordtype	eprints
spelling	um-154992015-12-31T01:04:03Z Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices Lim, K.G. Chew, K.H. Wang, D.Y. Ong, L.H. Iwata, M. Q Science (General) Based on the Landau-Ginzburg theory, the screening charge compensation phenomena for polarization discontinuities at interface in ferroelectric superlattices are investigated. Interface mixing leads to polarization continuity or discontinuity in superlattices. Free charge with equal but of opposite sign for alternate interface, driven by internal electric field, builds up to counteract the depolarization effect in superlattices. The charge density depends on the degree of interface mixing, and it approaches a saturated value when the mismatch of internal field or polarization at interface vanishes. Using PbTiO3/SrTiO3 (PT/ST) as a model system, the charge compensation phenomena for polarization discontinuities in superlattices is investigated by examining the polarization and internal electric field profiles. Dependence of local polarization and internal field at the interfaces on screening charge density is also examined in detail. Copyright (C) EPLA, 2014 EPL Association, European Physical Society 2014 Article PeerReviewed Lim, K.G.; Chew, K.H.; Wang, D.Y.; Ong, L.H.; Iwata, M. (2014) Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices. EPL <http://eprints.um.edu.my/view/publication/EPL.html>, 108 (6). http://eprints.um.edu.my/15499/
repository_type	Digital Repository
institution_category	Local University
institution	University Malaya
building	UM Research Repository
collection	Online Access
topic	Q Science (General)
spellingShingle	Q Science (General) Lim, K.G. Chew, K.H. Wang, D.Y. Ong, L.H. Iwata, M. Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
description	Based on the Landau-Ginzburg theory, the screening charge compensation phenomena for polarization discontinuities at interface in ferroelectric superlattices are investigated. Interface mixing leads to polarization continuity or discontinuity in superlattices. Free charge with equal but of opposite sign for alternate interface, driven by internal electric field, builds up to counteract the depolarization effect in superlattices. The charge density depends on the degree of interface mixing, and it approaches a saturated value when the mismatch of internal field or polarization at interface vanishes. Using PbTiO3/SrTiO3 (PT/ST) as a model system, the charge compensation phenomena for polarization discontinuities in superlattices is investigated by examining the polarization and internal electric field profiles. Dependence of local polarization and internal field at the interfaces on screening charge density is also examined in detail. Copyright (C) EPLA, 2014
format	Article
author	Lim, K.G. Chew, K.H. Wang, D.Y. Ong, L.H. Iwata, M.
author_facet	Lim, K.G. Chew, K.H. Wang, D.Y. Ong, L.H. Iwata, M.
author_sort	Lim, K.G.
title	Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
title_short	Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
title_full	Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
title_fullStr	Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
title_full_unstemmed	Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
title_sort	charge compensation phenomena for polarization discontinuities in ferroelectric superlattices
publisher	EPL Association, European Physical Society
publishDate	2014
url	http://eprints.um.edu.my/15499/
first_indexed	2018-09-06T06:30:51Z
last_indexed	2018-09-06T06:30:51Z
_version_	1610838653651648512

Charge compensation phenomena for polarization discontinuities in ferroelectric superlattices

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