The electron effective mass, me, has been determined by magnetophotoluminescence in as-grown and hydrogenated Ga As1-x Nx samples for a wide range of nitrogen concentrations (from x<0.01% to x=1.78%). A modified kp model, which takes into account hybridization effects between N cluster states and the conduction band edge, reproduces quantitatively the experimental me values up to x≤0.6%. Experimental and theoretical evidence is provided for the N complexes responsible for the nonmonotonic and initially puzzling compositional dependence of the electron mass.
Interaction between conduction band edge and nitrogen states probed by carrier effective-mass measurements in GaAs(1-x)N(x) / Masia, F., Pettinari, G., Polimeni, A., Felici, M., Miriametro, A., Capizzi, M., Lindsay, A., Healy, S.B., O'Reilly, E.P., Cristofoli, A., Bais, G., Piccin, M., Rubini, S., Martelli, F., Franciosi, A., Klar, P.J., Volz, K., Stolz, W.. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 73:(2006), pp. 073201 1-073201 4. [10.1103/PhysRevB.73.073201]
Interaction between conduction band edge and nitrogen states probed by carrier effective-mass measurements in GaAs(1-x)N(x)
FRANCIOSI, ALFONSO;
2006-01-01
Abstract
The electron effective mass, me, has been determined by magnetophotoluminescence in as-grown and hydrogenated Ga As1-x Nx samples for a wide range of nitrogen concentrations (from x<0.01% to x=1.78%). A modified kp model, which takes into account hybridization effects between N cluster states and the conduction band edge, reproduces quantitatively the experimental me values up to x≤0.6%. Experimental and theoretical evidence is provided for the N complexes responsible for the nonmonotonic and initially puzzling compositional dependence of the electron mass.Pubblicazioni consigliate
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