The effective gyromagnetic factor of electrons, ge*, has been determined by Zeeman splitting measurements in a large number of Ga As1-x Nx GaAs (x<0.7%) samples. Upon N incorporation, ge* shows first a sign reversal with respect to that of GaAs, then increases abruptly for a nitrogen concentration of order of 0.04%, and finally displays a nonmonotonic dependence on composition for higher x values. This behavior is well reproduced by a modified kp model taking into account a nonmonotonic loss of Γ character of the conduction band minimum due to multiple crossings between the redshifting conduction band edge and N -cluster states.

Influence of N-cluster states on the gyromagnetic factor of electrons in GaAs(1-x)N(x)

FRANCIOSI, ALFONSO
2006

Abstract

The effective gyromagnetic factor of electrons, ge*, has been determined by Zeeman splitting measurements in a large number of Ga As1-x Nx GaAs (x<0.7%) samples. Upon N incorporation, ge* shows first a sign reversal with respect to that of GaAs, then increases abruptly for a nitrogen concentration of order of 0.04%, and finally displays a nonmonotonic dependence on composition for higher x values. This behavior is well reproduced by a modified kp model taking into account a nonmonotonic loss of Γ character of the conduction band minimum due to multiple crossings between the redshifting conduction band edge and N -cluster states.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11368/1694177
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