title: Cooper pair cotunneling in single charge transistors with dissipative electromagnetic environment.
abstract: We observed current-voltage characteristics of superconducting single charge transistors with on-chip resistors of R approximately R(Q)=h/4e(2) approximately 6.45 kOmega, which are explained in terms of Cooper pair cotunneling. Both the effective strength of Josephson coupling and the cotunneling current are modulated by the gate-induced charge on the transistor island. For increasing values of the resistance R we found the Cooper pair current at small transport voltages to be dramatically suppressed.
authors: Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany.
authors: S V
authors: SV
authors: Lotkhov
authors: S A
authors: SA
authors: Bogoslovsky
authors: A B
authors: AB
authors: Zorin
authors: J
authors: J
authors: Niemeyer