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Progress towards making ferroelectrics from systems of rotating electric dipoles

Event Details

Event Dates: 

Friday, November 2, 2018 - 4:00pm

Seminar Location: 

  • JILA Auditorium

Speaker Name(s): 

Charles Rogers

Speaker Affiliation(s): 

University of Colorado Boulder
Seminar Type/Subject

Scientific Seminar Type: 

  • Phys Chem/Chem Phys Seminar

Event Details & Abstract: 

We are working on a project that involves chemists and physicists in an effort to build 2-dimensional and 3-dimensional crystalline solids that carry an electric dipole moment in each unit of the material and that take on ordered phases of the electric dipoles due to electric dipole - dipole interactions. Statistical mechanics models often invoke arrays of local dipole moments with near neighbor interactions that lead to ordered phases. At least in the case of electric dipole moments, while there are many examples of ordered dipolar phases e.g., ferroelectrics, it appears that there are no examples found in nature where these phases arise in solids from the dipolar interactions. I will describe our efforts with Prof. Josef Michl's lab to create such phases by using a host/guest approach with host crystals of tris (o-phenylenedioxy) cyclotriphosphazene (TPP) and molecular guests with electric-dipole groups that have low barriers to rotation about an axis.

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