Probing Nanoscale Ferroelectricity by Ultraviolet Raman Spectroscopy

Autor:	Andrés Cantarero, Serge Nakhmanson, Quanxi Jia, Kyoung Jin Choi, Wei Tian, Karin M. Rabe, Xiaoqing Pan, Xiaoxing Xi, Axel Bruchhausen, Arsen Soukiassian, J. H. Haeni, Alejandro Fainstein, D. A. Tenne, Darrell G. Schlom, Long Qing Chen, Norberto D. Lanzillotti-Kimura, Chang-Beom Eom, Haiping Sun, V. Vaithyanathan, Ram S. Katiyar, D. M. Kim, Yulan Li
Rok vydání:	2006
Předmět:	Multidisciplinary Materials science Nanostructure Quantum paraelectricity Condensed matter physics Phonon Superlattice Analytical chemistry Dielectric Ferroelectricity chemistry.chemical_compound symbols.namesake chemistry Strontium titanate symbols Raman spectroscopy
Zdroj:	Science. 313:1614-1616
ISSN:	1095-9203 0036-8075
Popis:	We demonstrated that ultraviolet Raman spectroscopy is an effective technique to measure the transition temperature ( T c ) in ferroelectric ultrathin films and superlattices. We showed that one-unit-cell-thick BaTiO 3 layers in BaTiO 3 /SrTiO 3 superlattices are not only ferroelectric (with T c as high as 250 kelvin) but also polarize the quantum paraelectric SrTiO 3 layers adjacent to them. T c was tuned by ∼500 kelvin by varying the thicknesses of the BaTiO 3 and SrTiO 3 layers, revealing the essential roles of electrical and mechanical boundary conditions for nanoscale ferroelectricity.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1f299715946523d92aae6cc265596474 https://doi.org/10.1126/science.1130306 Zobrazit plný text záznamu Plný text ve formátu PDF