本文用密度泛函理论框架下的离散变分方法(DVM)研究了bccFe[100](001)刃型位错体系的电子结构,给出了结合能、原子间相互作用能以及电荷转移信息.结果表明:通过结合能的计算可确立用于电子结构研究的团簇平衡构型.此外,原子间相互作用能的计算以及差分电荷密度分析表明在位错芯的压缩区,沿滑移面的原子对之间的化学键较强,而垂直于滑移面的键较弱.反之在位错的膨胀区,沿滑移面的原子对之间的化学键较弱,而垂直于滑移面的键较强,预期与位错承受外力作用时的原子错动变化以及位错在晶体中的运动相关.
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