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Pressure induced phase transition in ZnS

机译:ZnS中的压力诱导相变

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The phase transition of ZnS from the zincblende (ZB) structure to the rocksalt (RS) structure is investigated by the ab initio plane-wave pseudopotential density functional theory method. It is found that the pressures for transition from the ZB structure to the RS structure are 17.5 GPa from total energy-volume data and 15.4 GPa from equal enthalpies, consistent with the experimental data. From the high pressure elastic constants obtained, we find that the ZB structure ZnS is unstable when the applied pressure is larger than 17 GPa. Moreover, the dependence of the normalized primitive cell volume V/V-0 on pressure P can also be successfully obtained. (c) 2006 Elsevier Ltd. All rights reserved.
机译:从头算平面波pseudo势密度泛函理论方法研究了ZnS从闪锌矿(ZB)结构到岩盐(RS)结构的相变。从实验数据可以看出,从ZB结构到RS结构的转变压力从总能量数据来看是17.5 GPa,在相等焓下是15.4 GPa。从获得的高压弹性常数中,我们发现当施加压力大于17 GPa时ZB结构ZnS不稳定。而且,还可以成功地获得归一化的原始细胞体积V / V-0对压力P的依赖性。 (c)2006 Elsevier Ltd.保留所有权利。

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