Abstract
Quasi ballistic transport in a 2 dimension electron gas was explored and tunneling through an electrostatic barrier induced by metallic gates on the top of the heterostructure was demonstrated. For energies above 36 me V we observed the LO phonon emission, leading to a short mean free path. At energies below the phonon energy we find a mean free path of the order of 2-mu-m, about an order of magnitude longer than expected theoretically for electron interactions. The angular distribution of hot electrons injected from a point source was shown to be collimated and could be steered by controling the electrostatic profile of the injector. In addition we demonstrated operation of electrostatic lens which opens a new branch in semiconductor physics, namely, electron- optics in solids.
| Original language | English |
|---|---|
| Pages (from-to) | 59-69 |
| Number of pages | 11 |
| Journal | Acta Physica Polonica A |
| Volume | 79 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Jan 1991 |
| Externally published | Yes |
| Event | 19TH INTERNATIONAL SCHOOL ON PHYSICS OF SEMICONDUCTING COMPOUNDS - JASZOWIEC, Poland Duration: 22 Apr 1990 → 28 Apr 1990 Conference number: 19 |