LOW-DIMENSIONAL ELECTRON-TRANSPORT PROPERTIES IN INAS ALGASB MESOSCOPIC STRUCTURES/

We report on the successful fabrication and electrical transport prope rties of single quantum wires fabricated by using InAs/AlGaSb heterost ructures. Magnetotransport and high electric field characteristics hav e been measured on the various size of quantum wires. From comparison with the channel length-dependence of I-V characteristics of the diffe r ent size quantum wires, we try to develop a comprehensive understand ing on the quasi-one dimensional electron transport in InAs from the n early ballistic regime to the hot electron condition. The fabrication and characteristics of superconducting weak link InAs/Pb:In devices ar e also reported. The modulation of differential conductivity has been observed by the gate bias voltage between the superconducting Pb-In co ntacts. (C) 1997 Academic Press Limited