Random telegraph signal in a metallic double-dot system.
In this work, we investigate the dynamics of a single electron surface trap, embedded in a self-assembly metallic double-dot system. The charging and discharging of the trap by a single electron is manifested as a random telegraph signal of the current through the double-dot device. We find that we can control the duration time that an electron resides in the trap through the current that flows in the device, between fractions of a second to more than an hour. We suggest that the observed switching is the electrical manifestation of the optical blinking phenomenon, commonly observed in semiconductor quantum dots.
Department of Condensed Matter Physics, Weizmann Institute of Science , Rehovot 76100, Israel.
Yuval
Y
Vardi
Avraham
A
Guttman
Israel
I
Bar-Joseph