Magnetoluminescence study on the effective mass anisotropy of CuPtB-ordered GaInP2 alloys

Autor:	Yong Zhang, Christian Geng, F. Scholz, Angelo Mascarenhas, Eric Daniel Jones, Heinz Schweizer, P. Ernst, F. A. J. M. Driessen
Rok vydání:	1997
Předmět:	Materials science Effective mass (solid-state physics) Condensed matter physics Band gap Exciton Binding energy General Physics and Astronomy Electronic structure Reduced mass Anisotropy Magnetic field
Zdroj:	Journal of Applied Physics. 81:2814-2817
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.363938
Popis:	Photoluminescence measurements in a magnetic field between 0 and 13.6 T were carried out on CuPtB-ordered GaInP at liquid-helium temperature. Four samples of different degrees of ordering (η, varying from 0 to 0.54) were studied. Experimental results show that the ordering not only induces a band-gap reduction and valence-band splitting, it also causes changes in effective masses and an effective mass anisotropy. By measuring and analyzing the magnetoluminescence with the magnetic field aligned along both ordering (the [111]) and growth (the [001]) directions, we demonstrate that, for the band-edge excitonic state, the reduced mass in the plane perpendicular to the ordering direction is smaller than that in the ordering direction and also smaller than that of a disordered alloy. The exciton binding energy is found nearly independent of the degree of ordering, in agreement with theoretical predictions.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bcbc099d738e83e65deb3d4413a00013 https://doi.org/10.1063/1.363938 Zobrazit plný text záznamu