Abstract
Landau-level lifetimes are determined from saturation cyclotron resonance measurements on an InAs/GaSb double heterojunction using a picosecond far-infrared free-electron laser. Strong nonparabolicity of the conduction band truncates the equidistant Landau-level ladder, and saturation is achieved at all wavelengths. The Landau-level lifetimes show minima at N(Latin small letter h with stroke sign)?c=(Latin small letter h with stroke sign)?LO, a direct observation of the magnetophonon effect. Observed picosecond lifetimes are due to LO-phonon emission which dominates electron-electron scattering at the magnetophonon resonance condition.
Original language | English |
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Pages (from-to) | 16481-16484 |
Number of pages | 4 |
Journal | Physical Review B: Condensed Matter and Materials Physics |
Volume | 53 |
Issue number | 24 |
Publication status | Published - 15 Jun 1996 |