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

TitleDirect observation of magnetophonon resonances in Landau-level lifetimes of a semiconductor heterostructure
Publication TypeJournal Article
Year of Publication1996
AuthorsT.A Vaughan, R.J Nicholas, C Langerak, B.N Murdin, C.R Pidgeon, N.J Mason, P.J Walker
JournalPhysical Review B
Volume53
Number24
Pagination16481-16484
Date PublishedJun 15
ISBN Number0163-1829
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 NHBAR omega(c) = HBAR omega(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.

DOI10.1103/PhysRevB.53.16481
PID

e31403e3b98754a0de01eaff23368f89

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