Probing nanoscale ferroelectricity by ultraviolet Raman spectroscopy

被引：285

作者：

Tenne, D. A.

Bruchhausen, A.

Lanzillotti-Kimura, N. D.

Fainstein, A.

Katiyar, R. S.

Cantarero, A.

Soukiassian, A.

Vaithyanathan, V.

Haeni, J. H.

Tian, W.

Schlom, D. G.

Choi, K. J.

Kim, D. M.

Eom, C. B.

Sun, H. P.

Pan, X. Q.

Li, Y. L.

Chen, L. Q.

Jia, Q. X.

Nakhmanson, S. M.

Rabe, K. M.

Xi, X. X.

机构：

[1] Penn State Univ, Dept Phys, University Pk, PA 16802 USA

[2] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[3] Comis Nacl Energia Atom, Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Univ Puerto Rico, Dept Phys, Rio Piedras, PR 00931 USA

[5] Univ Valencia, Inst Sci Mat, E-46071 Valencia, Spain

[6] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[7] Univ Wisconsin, Dept Mat Sci & Engn, Madison, WI 53706 USA

[8] Univ Michigan, Dept Mat Sci & Engn, Ann Arbor, MI 48109 USA

[9] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[10] Rutgers State Univ, Dept Phys & Astron, Piscataway, NJ 08854 USA

来源：

SCIENCE | 2006年 / 313卷 / 5793期

关键词：

D O I：

10.1126/science.1130306

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 BaTiO3 layers in BaTiO3/ SrTiO3 superlattices are not only ferroelectric (with T-c as high as 250 kelvin) but also polarize the quantum paraelectric SrTiO3 layers adjacent to them. T-c was tuned by similar to 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.

引用

页码：1614 / 1616

页数：3

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