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A Look Inside The World of Antiferroelectrics

Ferroelectrics, or materials with a switchable electric polarization, are notable for their interesting physics as much as their wide variety of technological applications: although electric dipole moments may seem straightforward to define, ferroelectrics research revealed that the polarization of a crystal actually has a deep quantum-mechanical nature. The design of new ferroelectrics and control of their polarization-related phenomena continues to draw tremendous interest today. In this talk I will survey antiferroelectrics, a closely-related class of materials which are less-studied, but no less promising or intriguing. After an introduction to their history and basic properties, I will discuss recent experiments and calculations showing that antiferroelectrics’ electromechanical response can rival that of conventional ferroelectrics, as well as situations in which antiferroelectrics’ unusual behavior hints at unexplored underlying physics.

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