Phonon-assisted transitions of bound excitons in diamond: Analysis by mirror symmetry

Phonon-assisted transitions of bound excitons in diamond: Analysis by mirror symmetry
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金刚石中束缚激子的声子辅助跃迁:镜面对称分析

DOI:
10.1103/physrevb.101.205204
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发表时间:
2020
期刊:
影响因子:
3.7
通讯作者:
Naka Nobuko
Naka Nobuko
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Kubo Yoshiki;Takahata Mitsuyoshi;Temgoua Solange;Issaoui Riadh;Barjon Julien;Naka Nobuko

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这项研究旨在定量地了解间接半导体中与声子弱耦合的束缚激子的光谱,这是几十年来一直缺失的。通过分析报道的适当掺硼金刚石的光谱,获得了对中性受主杂质上激子束缚性质的见解[Y.Kubo,Appl.太棒了。让我们来吧。114,132104(2019年)APPLAB0003-695110.1063/1.5089894]。重点研究了声子辅助吸收和发光在能量、线宽和强度上同时保持的镜面对称性。提出了重现声子辅助复合谱线的新的解析表达式。详细的分析揭示了激发束缚激子态的贡献,并对其起源进行了讨论和模型化。考虑到它们,间接带隙半导体中束缚激子光谱的模拟可以提高到一个定量的水平。
This study aims at a quantitative understanding of the optical spectra taken from bound excitons weakly coupled to phonons in indirect semiconductors, which had been missing for decades. Insights on the properties of excitons bound at neutral acceptor impurities are obtained by analyzing the spectra reported for diamond with appropriate boron doping [Y. Kubo , Appl. Phys. Lett. 114, 132104 (2019)APPLAB0003-695110.1063/1.5089894]. We focus on the mirror symmetry holding between phonon-assisted absorption and luminescence simultaneously regarding energies, linewidths, and intensities. New analytic expressions are proposed to reproduce the spectra of phonon-assisted recombination lines. The detailed analysis reveals the contribution from excited bound-exciton states whose origin is discussed and modeled. Taking them into account improves simulation of the bound-exciton optical spectra in indirect band-gap semiconductors up to a quantitative level.
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