THE ALTERNATING-CURRENT RESPONSE OF ONE-DIMENSIONAL HOT-ELECTRONS IN CYLINDRICAL QUANTUM WIRES

Linear ac transport of a one-dimensional electron gas in cylindrical G aAs quantum wires (QWs) under zero to moderate de bias fields has been examined on the basis of the balance equation transport theory. Dynam ic screening of the electron-electron interaction is considered in the random phase approximation. In contrast to the case without a de bias field, the ac mobility contains an additional contribution from the e lectron temperature oscillation when a de bias field is simultaneously applied. Numerical results at 4.2 K show that the plasma contribution s noticeably change the memory functions even with a de bias of modera te strength. As a result, the ac mobility is appreciably influenced by the plasma excitation at frequency ranging from 1 GHz to 30 GHz.