Abstract
The energy-loss rate of degenerate hot electrons itinerant one-dimensionally in a quantum well wire structure of square cross section and of side length L is studied theoretically. Polar coupling to longitudinal optic (LO) phonons and deformation potential coupling to acoustic phonons are considered. The non-equilibrium distribution of LO phonons is found to slow the cooling rate by a factor that may be as large as 4.4 for L=100 AA and 6.2 for L=60 AA at an electron temperature (Te) of 100 K. The energy-loss rate due to acoustic phonons is found to be greater than that due to LO phonons for Te<38 K for L=100 AA and for Te<43 K for L=60 AA.
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