Abstract
A significant reduction of the two-dimensional electron gas (2DEG) density (formula presented) in a modulation doped GaAs/AlGaAs quantum well is observed when the 2D-electrons are heated by microwave (mw) irradiation at 1.8 K. A dependence of (formula presented) on the effective electron temperature (formula presented) leads to a remarkable hysteresis of the optically detected dimensional magnetoplasma (cyclotronlike) resonance, namely, to a bistability of the 2DEG-free hole photoluminescence (PL) spectrum as the magnetic field is scanned back and forth. The (formula presented) and (formula presented) values for the nonequilibrium 2DEG are obtained from the PL spectrum analysis. The PL time-resolved study shows that (formula presented) depends on the mw pulse duration and has a long recovery time (formula presented) This phenomenon is attributed to an increased vertical transport of the warm electrons out of the quantum well.
| Original language | English (US) |
|---|---|
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 64 |
| Issue number | 16 |
| DOIs | |
| State | Published - 2001 |
| Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics