Strain control of layer-resolved negative capacitance in superlattices

Abstract Negative capacitance in BaTiO3/SrTiO3 superlattices is investigated by Monte Carlo simulations in an atomistic effective Hamiltonian model, using fluctuation formulas for responses to the local macroscopic field that incorporates depolarizing fields. We show that epitaxial strain can tune t...

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Autores principales:	Raymond Walter, Sergey Prosandeev, Charles Paillard, L. Bellaiche
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
Acceso en línea:	https://doaj.org/article/d64272a8bccf45329f5f0d32a7dde6d2
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spelling	oai:doaj.org-article:d64272a8bccf45329f5f0d32a7dde6d22021-12-02T16:19:59ZStrain control of layer-resolved negative capacitance in superlattices10.1038/s41524-020-00459-42057-3960https://doaj.org/article/d64272a8bccf45329f5f0d32a7dde6d22020-12-01T00:00:00Zhttps://doi.org/10.1038/s41524-020-00459-4https://doaj.org/toc/2057-3960Abstract Negative capacitance in BaTiO3/SrTiO3 superlattices is investigated by Monte Carlo simulations in an atomistic effective Hamiltonian model, using fluctuation formulas for responses to the local macroscopic field that incorporates depolarizing fields. We show that epitaxial strain can tune the negative capacitance of the BaTiO3 ferroelectric layer and the overall capacitance of the system. In addition, we predict and explain an original switching of the negative capacitance from the BaTiO3 layer to the SrTiO3 layer at low temperatures for intermediate strains.Raymond WalterSergey ProsandeevCharles PaillardL. BellaicheNature PortfolioarticleMaterials of engineering and construction. Mechanics of materialsTA401-492Computer softwareQA76.75-76.765ENnpj Computational Materials, Vol 6, Iss 1, Pp 1-4 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765
spellingShingle	Materials of engineering and construction. Mechanics of materials TA401-492 Computer software QA76.75-76.765 Raymond Walter Sergey Prosandeev Charles Paillard L. Bellaiche Strain control of layer-resolved negative capacitance in superlattices
description	Abstract Negative capacitance in BaTiO3/SrTiO3 superlattices is investigated by Monte Carlo simulations in an atomistic effective Hamiltonian model, using fluctuation formulas for responses to the local macroscopic field that incorporates depolarizing fields. We show that epitaxial strain can tune the negative capacitance of the BaTiO3 ferroelectric layer and the overall capacitance of the system. In addition, we predict and explain an original switching of the negative capacitance from the BaTiO3 layer to the SrTiO3 layer at low temperatures for intermediate strains.
format	article
author	Raymond Walter Sergey Prosandeev Charles Paillard L. Bellaiche
author_facet	Raymond Walter Sergey Prosandeev Charles Paillard L. Bellaiche
author_sort	Raymond Walter
title	Strain control of layer-resolved negative capacitance in superlattices
title_short	Strain control of layer-resolved negative capacitance in superlattices
title_full	Strain control of layer-resolved negative capacitance in superlattices
title_fullStr	Strain control of layer-resolved negative capacitance in superlattices
title_full_unstemmed	Strain control of layer-resolved negative capacitance in superlattices
title_sort	strain control of layer-resolved negative capacitance in superlattices
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/d64272a8bccf45329f5f0d32a7dde6d2
work_keys_str_mv	AT raymondwalter straincontroloflayerresolvednegativecapacitanceinsuperlattices AT sergeyprosandeev straincontroloflayerresolvednegativecapacitanceinsuperlattices AT charlespaillard straincontroloflayerresolvednegativecapacitanceinsuperlattices AT lbellaiche straincontroloflayerresolvednegativecapacitanceinsuperlattices
_version_	1718384202215325696

Strain control of layer-resolved negative capacitance in superlattices

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