Low-temperature energy relaxation in AlxGa1-xAs/GaAs heterojunctions

T. Kawamura, S. Das Sarma, R. Jalabert, Jainendra K. Jain

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23 Scopus citations


The total average energy-loss rate of a two-dimensional electron gas in an AlxGa1-xAs/GaAs heterojunction at low temperatures is calculated for various densities and lattice temperatures. We take into account the inelastic scattering mechanisms due to acoustic phonons via deformation potential and piezoelectric coupling, and low-energy phonon modes associated with the coupling of quasiparticle excitations to the LO phonons. At high-carrier densities we show that the inclusion of these new phonon modes can explain the experimental data of Manion et al. [Phys. Rev. B 35, 9203 (1987)] for the energy-loss rates at low temperatures without using an enhanced value of the deformation-potential constant.

Original languageEnglish (US)
Pages (from-to)5407-5410
Number of pages4
JournalPhysical Review B
Issue number8
StatePublished - Jan 1 1990

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics


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