Rimberg, Alexander J.2009-06-042009-06-041999Lu, Wei. "Electrical transport in a single-electron transistor coupled to a tunable environment." (1999) Master’s Thesis, Rice University. <a href="https://hdl.handle.net/1911/17284">https://hdl.handle.net/1911/17284</a>.https://hdl.handle.net/1911/17284A novel model system is developed to study the effects of the environment on transport properties of a superconducting single-electron transistor (S-SET). The impedance of a two-dimensional electron gas (2DEG) 50 nm below the sample surface serving as the environment can be tuned in situ. A quantum dot is readily formed in the 2DEG. Josephson tunneling processes in the SET are suppressed and quasiparticle tunneling processes are enhanced as the 2DEG is confined. Important energetic parameters of the SET such as the charging energy $E\sb{c}$ and superconducting energy gap $\triangle$ remain almost unchanged in this process.74 p.application/pdfengCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.ElectronicsElectrical engineeringCondensed matter physicsThesisTHESIS PHYS. 1999 LU