Probing Nanoscale Ferroelectricity by Ultraviolet Raman Spectroscopy | Zendy

D. A. Ténné | Zendy; A. Bruchhausen | Zendy; N. D. LanzillottiKimura | Zendy; A. Fainstein | Zendy; Ram S. Katiyar | Zendy; A. Cantarero | Zendy; A. Soukiassian | Zendy; V. Vaithyanathan | Zendy; J. H. Haeni | Zendy; Wei Tian | Zendy; Darrell G. Schlom | Zendy; Kyu-Jin Choi | Zendy; D. M. Kim | Zendy; ChangBeom Eom | Zendy; H. P. Sun | Zendy; Xiaoqing Pan | Zendy; Yulan Li | Zendy; LongQing Chen | Zendy; Q. X. Jia | Zendy; Serge Nakhmanson | Zendy; Karin M. Rabe | Zendy; X. X. Xi | Zendy

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Probing Nanoscale Ferroelectricity by Ultraviolet Raman Spectroscopy

Author(s) -

D. A. Ténné,

A. Bruchhausen,

N. D. LanzillottiKimura,

A. Fainstein,

Ram S. Katiyar,

A. Cantarero,

A. Soukiassian,

V. Vaithyanathan,

J. H. Haeni,

Wei Tian,

Darrell G. Schlom,

Kyu-Jin Choi,

D. M. Kim,

ChangBeom Eom,

H. P. Sun,

Xiaoqing Pan,

Yulan Li,

LongQing Chen,

Q. X. Jia,

Serge Nakhmanson,

Karin M. Rabe,

X. X. Xi

Publication year - 2006

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.1130306

Subject(s) - ferroelectricity , raman spectroscopy , nanoscopic scale , materials science , dielectric , superlattice , ultraviolet , spectroscopy , kelvin probe force microscope , condensed matter physics , nanotechnology , optoelectronics , optics , physics , atomic force microscopy , quantum mechanics

We demonstrated that ultraviolet Raman spectroscopy is an effective technique to measure the transition temperature (Tc) in ferroelectric ultrathin films and superlattices. We showed that one-unit-cell-thick BaTiO3 layers in BaTiO3/SrTiO3 superlattices are not only ferroelectric (with Tc as high as 250 kelvin) but also polarize the quantum paraelectric SrTiO3 layers adjacent to them. Tc was tuned by approximately 500 kelvin by varying the thicknesses of the BaTiO3 and SrTiO3 layers, revealing the essential roles of electrical and mechanical boundary conditions for nanoscale ferroelectricity.

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