Abstract
The dependence of the electron mass on hydrostatic pressure in N-diluted ( and 0.21%) is investigated by magnetophotoluminescence. Exceedingly large fluctuations (up to ) in the electron mass with increasing are found. These originate from a pressure-driven tuning of the hybridization degree between the conduction band minimum and specific nitrogen-related states. Present results suggest a hierarchy between different nitrogen complexes as regards the extent of the perturbation these complexes exert on the electronic properties of the GaAs host.
- Received 4 November 2006
DOI:https://doi.org/10.1103/PhysRevLett.98.146402
©2007 American Physical Society