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arXiv 1611.04086cond-mat.mtrl-sci
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高通量第一性原理计算揭示的小极化子电子能和弹性能的普适标度

Universal scaling of the electronic and the elastic energies of small polarons revealed by high-throughput first-principles calculations

Fei Zhou, Babak Sadigh, Daniel Aberg

摘要:

自陷空穴(STH)的形成在闪烁体材料,包括卤化物和硫属化物的全面列表中,使用准确和计算效率高的第一性原理方法,极化子自相互作用校正(pSIC)的研究。从卤化物到氧化物,再到开壳层阳离子体系,小孔极化子的关键特征,包括它们的几何形状、能量和局域化程度,都有很大的不同。然而,我们发现一个普遍的线性关系之间的能隙分离的束缚空穴能级的价带最大值和弹性能量与晶格位移场,伴随着极化子。

英文摘要:

Formation of self-trapped holes (STH) in a comprehensive list of scintillator materials, including halides and chalcogenides, are studied using an accurate and computationally efficient first-principles method, the polaron self-interaction correction (pSIC). The key characteristics of small hole polarons, including their geometries, energies and degree of localization, are found vastly different from halides to oxides to systems with open-shell cations. Nevertheless, we find a universal linear relation between the energy gap separating the bound hole level from the valence band maximum and the elastic energy associated with the lattice displacement field that accompanies the polaron.

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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