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The influence of nitrogen cluster states on the conduction band (CB) structure of GaAs 1-x N x is probed by measuring the effective mass and gyromagnetic ratio of electrons for x< 0.7%. An unusual compositional dependence of these two important CB parameters is found. Such behaviors are well reproduced by a modified k· p model taking into account a non-monotonic loss of γ character of the CB minimum due to multiple crossings between the red-shifting conduction band edge and N cluster states. As well, sudden variations in the ...
Publication date: 
1 Jan 2007

F Masia, G Pettinari, Antonio Polimeni, M Felici, R Trotta, M Capizzi, T Niebling, H Günther, PJ Klar, W Stolz, A Lindsay, EP O'Reilly, M Piccin, G Bais, S Rubini, F Martelli, A Franciosi

Biblio References: 
28th International Conference on the Physics of Semiconductors, ICPS 2006