Size effects on polar optical phonon scattering of 1-D and 2-D electron gas in synthetic semiconductors
Abstract
The total scattering rate and the transition probability for electron-phonon interaction in 1-D and 2-D semiconductor materials are calculated in taking into account the finite dimensions of the structure. Although noticeable, size effects on the scattering rate are generally small, with more pronounced features for 1-D structures than for 2-D structures. For 2-D layers, our theory agrees with recent experimental results whereas it contradicts the previous theory predicting large size effects and mass-independent electron-phonon scattering rates. In 1-D structures singularities in the phonon emission rate appear as a natural consequence of the 1-D density of states. However, for high energy the 1-D emission rate is found smaller than the corresponding 3-D rate. An additional consequence of the confinement is the quenching of the phonon absorption rate.
- Publication:
-
Journal of Applied Physics
- Pub Date:
- November 1984
- DOI:
- 10.1063/1.333820
- Bibcode:
- 1984JAP....56.2850L
- Keywords:
-
- Carrier Transport (Solid State);
- Electron Gas;
- Electron Phonon Interactions;
- Organic Semiconductors;
- Semiconductors (Materials);
- High Electron Mobility Transistors;
- Molecular Beam Epitaxy;
- Polar Gases;
- Size (Dimensions);
- Transition Probabilities;
- Solid-State Physics