Although ferroelectric compounds containing hydrogen bonds were among the first to be discovered, organic ferroelectrics are relatively rare. The discovery of high polarization at room temperature in croconic acid [Horiuchi et al., Nature (London) 463, 789 (2010)] has led to a renewed interest in organic ferroelectrics. We present an ab initio study of two ferroelectric organic molecular crystals, 1-cyclobutene-1,2-dicarboxylic acid (CBDC) and 2-phenylmalondialdehyde (PhMDA). By using a distortion-mode analysis we shed light on the microscopic mechanisms contributing to the polarization, which we find to be as large as 14.3 and 7.0 μC/cm2 for CBDC and PhMDA, respectively. These results suggest that it may be fruitful to search among known but poorly characterized organic compounds for organic ferroelectrics with enhanced polar properties suitable for device applications.

Stroppa, A., Di Sante, D., Horiuchi, S., Tokura, Y., Vanderbilt, D., Picozzi, S. (2011). Polar distortions in hydrogen-bonded organic ferroelectrics. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 84(1), 014101-014101 [10.1103/PhysRevB.84.014101].

Polar distortions in hydrogen-bonded organic ferroelectrics

Di Sante, D.;
2011

Abstract

Although ferroelectric compounds containing hydrogen bonds were among the first to be discovered, organic ferroelectrics are relatively rare. The discovery of high polarization at room temperature in croconic acid [Horiuchi et al., Nature (London) 463, 789 (2010)] has led to a renewed interest in organic ferroelectrics. We present an ab initio study of two ferroelectric organic molecular crystals, 1-cyclobutene-1,2-dicarboxylic acid (CBDC) and 2-phenylmalondialdehyde (PhMDA). By using a distortion-mode analysis we shed light on the microscopic mechanisms contributing to the polarization, which we find to be as large as 14.3 and 7.0 μC/cm2 for CBDC and PhMDA, respectively. These results suggest that it may be fruitful to search among known but poorly characterized organic compounds for organic ferroelectrics with enhanced polar properties suitable for device applications.
2011
Stroppa, A., Di Sante, D., Horiuchi, S., Tokura, Y., Vanderbilt, D., Picozzi, S. (2011). Polar distortions in hydrogen-bonded organic ferroelectrics. PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS, 84(1), 014101-014101 [10.1103/PhysRevB.84.014101].
Stroppa, A.; Di Sante, D.; Horiuchi, S.; Tokura, Y.; Vanderbilt, D.; Picozzi, S.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/874837
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