NEGATIVE ABSOLUTE CONDUCTIVITY IN QUANTUM WIRES

The effect of negative absolute conductivity in quasi-one-dimensional quantum wire structures is obtained by the Monte Carlo simulation. Thi s negative conductivity is associated with inelastic optical phonon sc attering leading to an asymmetric electron distribution function estab lished under conditions of intensive electron photoinjection. Simulati on results suggest that quantum wires are ideal for the experimental o bservation of negative absolute conductivity. The oscillations of phot oconductivity as a function of injection energy can reveal the spectru m of optical phonons in quantum wires which differs considerably from that in bulk materials.