J. Shirakashi et al., 298 K OPERATION OF NB NB OXIDE-BASED SINGLE-ELECTRON TRANSISTORS WITHREDUCED-SIZE OF TUNNEL-JUNCTIONS BY THERMAL-OXIDATION/, Journal of applied physics, 83(10), 1998, pp. 5567-5569
We present the successful operation of Nb/Nb oxide-based single-electr
on transistors at room temperature. At first, devices were fabricated
by scanning probe microscope based anodic oxidation technique. Then, t
he effective area of tunnel junctions was further shrunken by thermal
oxidation. Ultrasmall tunnel junctions were easily obtained utilizing
additional thermal oxidation process, and single-electron charging eff
ects were observed by means of the modulation of Coulomb blockade volt
ages at room temperature. (C) 1998 American Institute of Physics.