Direct observation of magnetophonon resonances in Landau-level lifetimes of a semiconductor heterostructure

T. A. Vaughan, R. J. Nicholas, C. J G M Langerak, B. N. Murdin, C. R. Pidgeon, N. J. Mason, P. J. Walker

Research output: Contribution to journalArticle

61 Citations (Scopus)

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 languageEnglish
Pages (from-to)16481-16484
Number of pages4
JournalPhysical Review B: Condensed Matter and Materials Physics
Volume53
Issue number24
Publication statusPublished - 15 Jun 1996

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