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Broader impact:

Complex phenomena in ferroelectrics and multiferroics from first principles Laurent Bellaiche, University of Arkansas, DMR 0701558.

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Broader impact:

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  1. Complex phenomena in ferroelectrics and multiferroics from first principles Laurent Bellaiche, University of Arkansas, DMR 0701558 Geometric frustration (GF) is a striking phenomenon that can induce unusual effects, such as complex microstructures and abnormal temperature behavior of physical properties. Until now, GF has been well documented in magnetic systems while it is basically unknown in the important class of materials formed by ferroelectrics (that exhibit spontaneous electrical, rather than magnetic, dipoles). Ab-initio calculations were performed to discover that some specific ferroelectrics can indeed possess all the fingerprints of GF. Such discovery provides a novel route to study and better understand GF in materials. [Nature 470, 513(2011)] Example of an exotic dipolar microstructure in frustrated ferroelectrics. This microstructure possesses unusual features, such as bending of dipolar lines, topological defects, herringbones, etc...

  2. Complex phenomena in ferroelectrics and multiferroics from first principles Laurent Bellaiche, University of Arkansas, DMR 0701558 • Broader impact: • 5 graduate students (including one of female gender) and 5 research associates (including one of female gender) contributed to the works. • The P.I. has also advised one graduate student from Ecole Centrale (Paris, France), and has been elected an APS fellow in Spring 2011. • Mrs. Lydie Louis worked at Ecole Centrale (France) in Summer 2010 to obtain a joint Ph.D. degree. She is now back in Arkansas to complete such degree. • Collaborations with international groups (in Czech Republic, France and Spain), and strongly involving students and research associates, occurred. • The P.I. taught Condensed Matter I and II courses in Fall 2010 and Spring 2011, respectively. Recent research findings on ferroelectrics and multiferroics were incorporated into these courses. • The P.I.’s group gave several invited talks at international conferences. • Several news articles about the NSF-sponsored research findings have appeared.

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