Ferroelectricity and multiferroicity in anti-Ruddlesden-Popper structures.
作者： Gian-Marco Rignanese , Philippe Ghosez , Eric Bousquet , Guido Petretto , Geoffroy Hautier
关键词: Absorption (chemistry) 、 Visible spectrum 、 Ferroelectricity 、 Condensed matter physics 、 Ferromagnetism 、 Magnetic order 、 Antiferroelectricity 、 Polar 、 Boundary value problem 、 Materials science
摘要: Combining ferroelectricity with other properties such as visible light absorption or long-range magnetic order requires the discovery of new families of ferroelectric materials. Here, through the analysis of a high-throughput database of phonon band structures, we identify a structural family of anti–Ruddlesden–Popper phases A 4 X 2 O (A= Ca, Sr, Ba, Eu, X= Sb, P, As, Bi) showing ferroelectric and antiferroelectric behaviors. The discovered ferroelectrics belong to the new class of hyperferroelectrics that polarize even under open-circuit …
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