The effective gyromagnetic factor of electrons, g(e)(*), has been determined by Zeeman splitting measurements in a large number of GaAs1-xNx/GaAs (x < 0.7%) samples. Upon N incorporation, g(e)(*) 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 k center dot p model taking into account a nonmonotonic loss of Gamma 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 GaAs1-xNx / Pettinari, Giorgio; Masia, Francesco; Polimeni, Antonio; Felici, Marco; Frova, Andrea; Capizzi, Mario; A., Lindsay; E. P., O'Reilly; P. J., Klar; W., Stolz; G., Bais; M., Piccin; S., Rubini; F., Martelli; A., Franciosi. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1550-235X. - STAMPA. - 74:(2006), pp. 245202-1-245202-5. [10.1103/PhysRevB.74.245202]
Influence of N-cluster states on the gyromagnetic factor of electrons in GaAs1-xNx
PETTINARI, GIORGIO;MASIA, Francesco;POLIMENI, Antonio;FELICI, Marco;FROVA, Andrea;CAPIZZI, Mario;
2006
Abstract
The effective gyromagnetic factor of electrons, g(e)(*), has been determined by Zeeman splitting measurements in a large number of GaAs1-xNx/GaAs (x < 0.7%) samples. Upon N incorporation, g(e)(*) 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 k center dot p model taking into account a nonmonotonic loss of Gamma character of the conduction band minimum due to multiple crossings between the redshifting conduction band edge and N-cluster states.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
