Charge Transport Processes in a Superconducting Single-Electron Transistor Coupled to a Microstrip Transmission Line

Details Charge Transport Processes in a Superconducting Single-Electron Transistor Coupled to a Microstrip Transmission Line Charge Transport Processes in a Superconducting Single-Electron Transistor Coupled to a Microstrip Transmission Line

2001-10-04

arxiv.org/abs/cond-mat/0110093v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures, REVTeX 4

Scientific paper

10.1103/PhysRevB.65.060501

We have investigated charge transport processes in a superconducting single-electron transistor (S-SET) fabricated in close proximity to a two-dimensional electron gas (2DEG) in a GaAs/AlGaAs heterostructure. The macroscopic bonding pads of the S-SET along with the 2DEG form a microstrip transmission line. We observe a variety of current-carrying cycles in the S-SET which we attribute to simultaneous tunneling of Cooper pairs and emission of photons into the microstrip. We find good agreement between these experimental results and simulations including both photon emission and photon-assisted tunneling due to the electromagnetic environment.

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