Studies of Interfacial Phenomena: Alkanethiol Adsorption and Patterning on Gold and the Superconducting Proximity Effect in Superconductor /Semiconductor Systems

The second phenomenon studied is the superconducting proximity effect at Nb/InAs and NbN/InAs interfaces. Previous investigations of Nb/InGaAs show an excess conductance at low bias voltages when the system is superconducting. However, current models do not sufficiently explain this excess conductance. Raman spectroscopy is used in this research to overcome difficulties in performing electrical measurements on the high transmittance Nb/InAs interface. Materials processing issues in producing high quality, reproducible Nb/InAs interfaces are discussed, including the effects of passivation, dry etching and metal film deposition. Although several Nb/InAs and NbN/InAs samples exhibited evidence of a superconducting proximity effect, additional processing issues must be overcome before a conclusive determination of the excess conduction mechanism can be ascertained.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Chemistry

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Tanzer, Troy Anthony

Contributors dc:contributor

• Bohn, Paul W.

• Physics, Condensed Matter

Language dc:language

eng

Identifier

(MiAaPQ)AAI9953156

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/84461