Donor binding energies in a GaN/ZnGeN2 quantum well
Küçük Resim Yok
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Academic Press Ltd- Elsevier Science Ltd
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Binding energies of a donor atom within a GaN/ZnGeN2 quantum well structure have been investigated. Hydrogenic type wave functions are assumed and the Schrodinger and Poisson's equations are solved self-consistently. The binding energies of the donor states is and 2p(+/-) associated with the first subband in the quantum well and the transition energies between them are represented as a function of the quantum well width, the donor position and the external magnetic field. The ground state is and the excited states 2p(+/-) have maximum binding energies as much as 64 and 11 meV, occurring in quantum wells of widths 10 and 18 angstrom, respectively. The binding energies are found to be an asymmetric function of the donor position with respect to the quantum well center because of the asymmetry in the band profile introduced by the built-in electric field in the structure. An external magnetic field up to 10 T is included into the calculations and it is seen that the excited states show a small Zeeman splitting, very close to the bulk GaN value, because of the heavy effective mass of electron. (C) 2017 Elsevier Ltd. All rights reserved.
Açıklama
Anahtar Kelimeler
ZnGeN2, Donor, Binding energy, Quantum well
Kaynak
Superlattices and Microstructures
WoS Q Değeri
Q3
Scopus Q Değeri
Q2
Cilt
111
