【摘 要】
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Rhombohedral BaTiO3 under hydrostatic pressure is investigated by first principles calculations.Our results show that just like tetragonal perovskites, as press
【机 构】
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Department of Physics, China University of Mining and Technology, Xuzhou 221116
论文部分内容阅读
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.
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