Pressure-Induced Anomalous Phase Transitions and Colossal Enhancements of Piezoelectricity in Ground-State BaTi03

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2011,（4）
• 页码范围: 156-159
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/28/4/046101

摘要

Rhombohedral BaTiO3 under hydrostatic pressure is investigated by first principles calculations.Our results show that just like tetragonal perovskites, as pressure increases, this material first becomes para-electric at low pressures, then transfers to another ferroelectric phase at much higher pressures.We also find a giant enhancement of piezoelectricity near the phase-transition regions, due to large atomic displacements along different directions in response to the applied pressures.