2018
DOI: 10.1103/physrevapplied.10.044040
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N -induced Quantum Dots in GaAs/Ga(N,

Abstract: Nanowires (NWs) with embedded zero-dimensional (0D) quantum dots (QDs) have interesting fundamental properties attractive for a variety of applications. The properties of such embedded QDs can be controlled by 0D quantum confinement and also via strain engineering in axial or radial heterostructures of the nanowire system. We evaluate the electronic structure of QDs, which are formed in the Ga(N, As) shell of the GaAs/Ga(N, As) core-shell NWs due to alloy fluctuations. It is found that the principal quantizati… Show more

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Cited by 6 publications
(15 citation statements)
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“…3(c). The obtained activation energies range between 2 and 30 meV, which is consistent with the values of spontaneously formed QDs in GaAsN 38 and AlGaAs 28 NWs due to short-range alloy fluctuations.…”
supporting
confidence: 85%
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“…3(c). The obtained activation energies range between 2 and 30 meV, which is consistent with the values of spontaneously formed QDs in GaAsN 38 and AlGaAs 28 NWs due to short-range alloy fluctuations.…”
supporting
confidence: 85%
“…4(d), the statistical distribution has a clear maximum at θ = 80-90 deg. Such preferred polarization direction is typical for an exciton with a predominantly heavy-hole character that is confined in the potential with the principal quantization direction along the NW axis, 38 corresponding to the orientation of the nanodisks seen in Fig. 1.…”
mentioning
confidence: 87%
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“…We have previously shown that the formation of selfassembled QDs is very efficient in novel GaNAs NWs, adding to numerous attractive properties of dilute nitride alloys [24][25][26][27][28]. The formation of these QDs is caused by clustering of N atoms, which leads to strong electron confinement facilitated by the giant bowing in the band-gap energy in dilute nitrides [22,29]. In contrast to self-assembled QDs in other material systems, spontaneously formed QDs in GaNAs NWs were found to be oriented along one preferred direction coinciding with the NW axis [29].…”
Section: Introductionmentioning
confidence: 99%