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Stability analysis of exciton, charged excitons, and biexciton in an InP/GaAs/GaSb type-II quantum dot heteronanostructure: a comparison of binding energy and diamagnetic susceptibility       
Yazarlar (1)
Dr. Öğr. Üyesi Fatih KOÇ Dr. Öğr. Üyesi Fatih KOÇ
Kırşehir Ahi Evran Üniversitesi, Türkiye
Devamını Göster
Özet
The present study focused on investigating the total energies, binding energies, and diamagnetic susceptibilities of excitons, negative and positive trions, and biexcitons within an InP/GaAs/GaSb type-II quantum dot heteronanostructure. The analysis has been carried out by varying the InP core radius, GaAs and GaSb layer thicknesses, and temperature. To obtain the energy levels and wavefunctions of the system, the Poisson-Schrodinger equation has been solved under the effective mass approximation and BenDaniel-Duke boundary conditions, considering the dielectric mismatch. The results of the calculations have revealed that while diamagnetic susceptibility could provide reliable information about the stability of the exciton, it has not offered the same level of accuracy when assessing the stability of the negative and positive trion and biexciton. Additionally, it has been observed that the dielectric mismatch effect can be influential, to the extent of reversing the expected trend in the binding energy, particularly when the GaAs layer thickness varies. On the other hand, the effect of temperature has been found to be limited and negligible due to the strong confinement of the quantum dot heteronanostructure.
Anahtar Kelimeler
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı The European Physical Journal Plus
Dergi ISSN 2190-5444 Wos Dergi Scopus Dergi
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q2
Makale Dili İngilizce
Basım Tarihi 12-2023
Cilt No 138
Sayı 12
Doi Numarası 10.1140/epjp/s13360-023-04744-1
Makale Linki http://dx.doi.org/10.1140/epjp/s13360-023-04744-1