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EnglishThe 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.
| Titolo: | Influence of N-cluster states on the gyromagnetic factor of electrons in GaAs(1-x)N(x) |
| Autori: | |
| Data di pubblicazione: | 2006 |
| Rivista: | |
| 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. |
| Handle: | http://hdl.handle.net/11368/1694177 |
| Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevB.74.245202 |
| URL: | http://prb.aps.org/abstract/PRB/v74/i24/e245202 |
| Appare nelle tipologie: | 1.1 Articolo in Rivista |
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