Loading...
Please wait, while we are loading the content...
Similar Documents
Subband quantum scattering times for algaas/gaas obtained using digital filtering
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Mena, R. A. Bibyk, S. B. Haughland, E. J. Alterovitz, S. A. Schacham, S. E. Ringel, S. A. |
| Copyright Year | 1995 |
| Description | In this study we investigate both the transport and quantum scattering times as a function of the carrier concentration for a modulation doped Al(0.3)Ga(0.7)As/GaAs structure. Carriers in the well are generated as a result of the persistent photoconductivity effect. When more than one subband becomes populated, digital filtering is used to separate the components for each of the excited subbands. We find that the quantum scattering time for the ground subband increases initially as the carrier concentration is increased. However, once the second subband becomes populated, the ground subband scattering time begins to decrease. The quantum scattering time for the excited subband is also observed to decrease as the concentration is increased. From the ratio of the transport and quantum scattering times, it is seen that the transport in the well becomes more isotropic also as the concentration is increased. |
| File Size | 490032 |
| Page Count | 12 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19950017768 |
| Archival Resource Key | ark:/13960/t4vj0g96w |
| Language | English |
| Publisher Date | 1995-03-01 |
| Access Restriction | Open |
| Subject Keyword | Solid-state Physics Aluminum Gallium Arsenides Gallium Arsenides Scattering Functions Doped Crystals Fermi Surfaces Carrier Density Solid State Carrier Mobility Digital Filters Quantum Theory Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
