Intersubband scattering as a tool to study the symmetry properties of a parabolic quantum well
The electron mobility in parabolic quantum wells is measured as a function of carrier density at low temperatures. The curves display pronounced maxima that indicate the onset of intersubband scattering, i.e. the population of another subband. We find that the population of a given subband only depe...
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| Veröffentlicht in: | Superlattices and microstructures 1994-01, Vol.15 (3), p.325-325 |
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| container_title | Superlattices and microstructures |
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| creator | Jurk, R. Ensslin, K. Hopkins, P.F. Gossard, A.C. |
| description | The electron mobility in parabolic quantum wells is measured as a function of carrier density at low temperatures. The curves display pronounced maxima that indicate the onset of intersubband scattering, i.e. the population of another subband. We find that the population of a given subband only depends on the total carrier density almost independent of the position of the wavefuntion within the well which can be tuned via a front and back gate electrode. This is in agreement with predictions for a perfect parabolic potential. If a potential spike is inserted in the center of the PQW we find a complicated behavior for the mobility versus carrier density maxima which reflects the changed symmetry of the potential. |
| doi_str_mv | 10.1006/spmi.1994.1063 |
| format | Article |
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| subjects | Condensed matter: electronic structure, electrical, magnetic, and optical properties Electron states and collective excitations in multilayers, quantum wells, mesoscopic, and nanoscale systems Electron states and collective excitations in thin films, multilayers, quantum wells, mesoscopic and nanoscale systems Electronic structure and electrical properties of surfaces, interfaces, thin films and low-dimensional structures Electronic transport in interface structures Exact sciences and technology Iii-v semiconductor-to-semiconductor contacts, p-n junctions, and heterojunctions Physics |
| title | Intersubband scattering as a tool to study the symmetry properties of a parabolic quantum well |
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