Polaronic effects on the intra-donor 1s→2p ± transition energies in GaN structures

Autor:	Francisco A. P. Osório, José R. Leite, R.B. Almeida, A. N. Borges, P.C.M. Machado
Rok vydání:	2004
Předmět:	Variational method Effective mass (solid-state physics) Condensed matter physics Phonon Chemistry Energy level splitting Materials Chemistry General Chemistry Electron Condensed Matter Physics Wave function Polaron Magnetic field
Zdroj:	Solid State Communications. 130:95-99
ISSN:	0038-1098
DOI:	10.1016/j.ssc.2004.01.002
Popis:	We report a calculation of the electron–phonon interaction effects on the 1s→2p± transition energies of a donor impurity present in a GaN-bulk in the presence of an external magnetic field. The energy levels are calculated through a variational method by choosing a two parameters gaussian trial wave function. The electron–LO phonon interaction is included by the Improved Wigner–Brillouin Perturbation Theory (IWBPT) as modified by Cohn, Larsen and Lax. Effects of non-parabolicity of the conduction band are also considered. In order to correctly describe the experimental data obtained by Moore et al. for GaN structures, the electron effective mass was used as a fitting parameter, and good agreement between the results was found for electron effective mass mb=0.23me. A resonant split of the 1s→2p+ transition energy is predicted to occur for magnetic field around 140 T.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6c63a30c88730ec99183a51fbbd240c6 https://doi.org/10.1016/j.ssc.2004.01.002 Zobrazit plný text záznamu Full Text from ScienceDirect