Abstract
Magnetophonon Resonance in parallel transport of three types Multiple Quantum Wells was studied. They consisted of ten QW of GaAs and ten AlGaAs barriers, and were obtained by the Metal Organic Vapour Deposition on semi-insulating GaAs. The MPR research were performed in pulsed magnetic fields up to 30 T. The transverse magnetoresistance was measured between 77K and 340K and the MPR oscillations extracted by subtracting a voltage linear in magnetic field. The oscillating part of magnetoresistance Δρ xx was recorded. A fine structure of MPR peaks was observed. This effect could be attributed to two phenomena: contribution of barrier phonons and influence of thermostresses.
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