TY - JOUR
T1 - Phonon-assisted transitions of bound excitons in diamond
T2 - Analysis by mirror symmetry
AU - Kubo, Yoshiki
AU - Takahata, Mitsuyoshi
AU - Temgoua, Solange
AU - Issaoui, Riadh
AU - Barjon, Julien
AU - Naka, Nobuko
N1 - Funding Information:
This work was partially supported by a Grant-in-Aid for Scientific Research (B) (Grant No. 17H02910) from JSPS, Japan, a Grant-in-Aid for Challenging Research (Exploratory) (Grant No. 19K21849) from JSPS, Japan, and PICS (Grant No. 200835) from Centre National de la Recherche Scientifique, France.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - 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.
AB - 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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U2 - 10.1103/PhysRevB.101.205204
DO - 10.1103/PhysRevB.101.205204
M3 - Article
AN - SCOPUS:85085840796
SN - 2469-9950
VL - 101
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
IS - 20
M1 - 205204
ER -