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arXiv 1702.04600cond-mat.str-elcond-mat.mtrl-scicond-mat.supr-con
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BaBiO3的高压phase diagram的从头计算

Ab-initio prediction of the high-pressure phase diagram of BaBiO3

Andriy Smolyanyuk, Lilia Boeri, Cesare Franchini

摘要:

BaBiO3是一个众所周知的三维电荷密度波化合物的例子,其中的CDW行为是由在Bi位的电荷极化引起的。在环境压力下,这种化合物是一种电荷有序绝缘体,但对其高压行为知之甚少。在这项工作中,我们从第一性原理研究的高压相图BaBiO3声子模式分析和演化的晶体结构预测。我们发现,电荷极化是非常强大的,在这种化合物,并持续高达100 GPa。这使得系统在我们研究的最高压力下保持绝缘。

英文摘要:

BaBiO3 is a well-known example of a 3D charge density wavecompound, in which the CDW behavior is induced by charge disproportionation at the Bi site. At ambient pressure, this compound is a charge-ordered insulator, but little is known about its high-pressure behavior. In this work, we study from first-principles the high-pressure phase diagram of BaBiO3 using phonon modes analysis and evolutionary crystal structure prediction. We show that charge disproportionation is very robust in this compound and persists up to 100 GPa. This causes the system to remain insulating up to the highest pressure we studied.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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