The influence of nitrogen cluster states on the conduction band (CB) structure of GaAs1-xNx 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 electron mass can be externally induced by applying a hydrostatic pressure, which brings the upward moving CB edge into interaction with N states, which at ambient pressure are resonant with the GaAs1-xNx CB continuum. © 2007 American Institute of Physics.
Photoluminescence under magnetic field and hydrostatic pressure in GaAs1−xNx for probing the compositional dependence of carrier effective mass and gyromagnetic ratio / F., Masia; Pettinari, Giorgio; Polimeni, Antonio; Felici, Marco; Trotta, Rinaldo; Capizzi, Mario; T., Niebling; H., Guenther; P. J., Klar; W., Stolz; A., Lindsay; E. P., O'Reilly; M., Piccin; G., Bais; S., Rubini; F., Martelli; A., Franciosi. - STAMPA. - 893:(2007), pp. 157-158. (Intervento presentato al convegno 28th International Conference on the Physics of Semiconductors (ICPS-28) tenutosi a Vienna; Austria nel 24-28 Luglio 2006) [10.1063/1.2729817].
Photoluminescence under magnetic field and hydrostatic pressure in GaAs1−xNx for probing the compositional dependence of carrier effective mass and gyromagnetic ratio
PETTINARI, GIORGIO;POLIMENI, Antonio;FELICI, Marco;TROTTA, RINALDO;CAPIZZI, Mario;
2007
Abstract
The influence of nitrogen cluster states on the conduction band (CB) structure of GaAs1-xNx 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 electron mass can be externally induced by applying a hydrostatic pressure, which brings the upward moving CB edge into interaction with N states, which at ambient pressure are resonant with the GaAs1-xNx CB continuum. © 2007 American Institute of Physics.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
