2018
DOI: 10.1063/1.5028370
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Excited states of neutral donor bound excitons in GaN

Abstract: We investigate the excited states of a neutral donor bound exciton (D0X) in bulk GaN by means of high-resolution, polychromatic photoluminescence excitation (PLE) spectroscopy. The optically most prominent donor in our sample is silicon accompanied by only a minor contribution of oxygen—the key for an unambiguous assignment of excited states. Consequently, we can observe a multitude of Si0X-related excitation channels with linewidths down to 200 μeV. Two groups of excitation channels are identified, belonging … Show more

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Cited by 9 publications
(9 citation statements)
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“…In both cases, the emission energy of the excitons exhibits a redshift with respect to X A , which will always be described by E loc in the following. Previous results have shown that the impurity giving rise to the dominant bound excitonic emission is the neutral silicon center Si 0 , while other typical trace impurities in GaN like oxygen are negligible in our samples [61]. In addition, toward lower energies one observes the L1 emission line in Fig.…”
Section: Fig 1 (A)supporting
confidence: 57%
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“…In both cases, the emission energy of the excitons exhibits a redshift with respect to X A , which will always be described by E loc in the following. Previous results have shown that the impurity giving rise to the dominant bound excitonic emission is the neutral silicon center Si 0 , while other typical trace impurities in GaN like oxygen are negligible in our samples [61]. In addition, toward lower energies one observes the L1 emission line in Fig.…”
Section: Fig 1 (A)supporting
confidence: 57%
“…Here, we obtain V D ¼ 10πr 3 D based on Ref. [68] with the donor Bohr radius r D that is derived from the silicon donor binding energy of 28.5 meV [61] calculated within the framework of the hydrogenic model [69]. This consideration of Si 0 X A as a three-particle complex leads to a reasonable agreement between experiment and theory [ Fig.…”
Section: A Probing Alloying With Free and Bound Excitons Based On Mamentioning
confidence: 53%
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“…See the main text for details. the donor Bohr radius r D that is derived from the silicon donor binding energy of 28.5 meV [54] calculated within the framework of the hydrogenic model [61]. This consideration of Si 0 X A as a three-particle complex leads to a reasonable agreement between experiment and theory [ Fig.…”
Section: A Probing Alloying With Free and Bound Excitons Based On Mamentioning
confidence: 96%