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Combined effects of screening and band gap renormalization on the energy of optical transitions in ZnO and GaN (2000)

Reynolds, D. C. ; Look, D. C. ; Jogai, B.

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 88 (2000), S. 5760-5763

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ISSN: 1089-7550

Source: AIP Digital Archive

Topics: Physics

Notes: The energy positions of the optical transitions in both GaN and ZnO were investigated when the samples were excited simultaneously with a HeCd laser and an Ar+ ion laser. The increased number of free electrons excited by the Ar+ ion laser will effectively screen both the free exciton and bound exciton transitions, resulting in a blueshift. The increased number of free electrons also produces many-body effects, which lead to a reduction of the band gap energy and thus a redshift. The resultant of screening and renormalization results in a redshift of the optical transitions in ZnO but a nearly vanishing shift in GaN. © 2000 American Institute of Physics.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1063/1.1320026

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