arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2302.09206cond-mat.mtrl-sci
收藏

$\beta$-LiGaO$_2$ 中缺陷复合体的计算研究及其与施主-受主对复合的关系

Computational study of defect complexes in $β$-LiGaO$_2$ and their relation to the donor-acceptor-pair recombination

Klichchupong Dabsamut, Adisak Boonchun, Walter R. L. Lambrecht

AI总结:

通过混合泛函计算,调整非局域交换以匹配 6.0 eV 激子带隙,研究了 LiGaO$_2$ 中本征缺陷及缺陷复合体的能级变化,并初步识别了施主-受主对复合的光致发光带。

摘要:

本文对 LiGaO$_2$ 中的缺陷进行了混合泛函计算,其中非局域交换的比例被调整以重现最近报道的 6.0 eV 激子带隙。我们研究了主要本征缺陷的缺陷转变能级相对于带边的变化,并与先前假设带隙接近 5.1 eV 的计算结果进行了比较。此外,我们考虑了由主要本征施主 Ga$_{\mathrm{Li}}$ 与主要受主 $V_{\mathrm{Li}}$ 和 Li$_{\mathrm{Ga}}$ 反位缺陷结合形成的缺陷复合体,并研究了它们相对位置的影响。这些结果被用于初步识别先前归属于施主-受主对复合的光致发光带。

英文摘要:

Hybrid functional calculations are presented for defects in LiGaO$_2$ with the fraction of non-local exchange adjusted to reproduce the recently reported exciton gap of 6.0 eV. We study how the defect transition levels of the main native defects change with respect to the band edges compared to earlier calculations which assumed a smaller band gap near 5.1 eV. In addition, we consider defect complexes formed by combining the main native donor Ga$_\mathrm{Li}$ with the main acceptors, $V_\mathrm{Li}$ and Li$_\mathrm{Ga}$ antisites as function of their relative position. These results are used to tentatively identify the photoluminescence bands previous assigned to donor-acceptor-pair recombination.

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。

↑