Energy and momentumloss rates of onedimensional hot electrons in semiconductor quantumwell wires
Abstract
Energy and momentumloss rates of degenerate hot electrons moving onedimensionally in a quantumwell wire structure of square cross section of side length L are calculated theoretically considering polar coupling to longitudinaloptic (LO) phonons and deformation potential and piezoelectric couplings to acoustic phonons. Piezoelectric scattering contributes the least, while the effect of deformation potential scattering in energy loss is unimportant compared to that of LO phonon scattering for electron temperatures (T_{e}) above about 50 K. In momentumloss rate, however, acoustic scattering continues to be important at higher values of T_{e}. The nonequilibrium distribution of LO phonons is found to reduce both the energy and momentumloss rates. The reduction factor of the total energyloss rate is 4.4 for L=10 nm and 6.2 for L=6 nm at T_{e} =100 K. The corresponding values for the net momentumloss rate are 2.3 and 2.5, respectively.
 Publication:

Journal of Applied Physics
 Pub Date:
 February 1989
 DOI:
 10.1063/1.342951
 Bibcode:
 1989JAP....65.1598K
 Keywords:

 Acoustic Scattering;
 Electron Phonon Interactions;
 Hot Electrons;
 Piezoelectricity;
 Quantum Wells;
 Semiconductors (Materials);
 Electron Energy;
 Electron Scattering;
 Gallium Arsenides;
 Transport Properties;
 Wire;
 SolidState Physics