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Full-Text Articles in Condensed Matter Physics
Tuning Vortex Fluctuations And The Resistive Transition In Superconducting Films With A Thin Overlayer, Alex Gurevich
Tuning Vortex Fluctuations And The Resistive Transition In Superconducting Films With A Thin Overlayer, Alex Gurevich
Physics Faculty Publications
It is shown that the temperature of the resistive transition Tr of a superconducting film can be increased by a thin superconducting or normal overlayer. For instance, deposition of a highly conductive thin overlayer onto a dirty superconducting film can give rise to an “antiproximity effect,” which manifests itself in an initial increase of Tr (d2) with the overlayer thickness d2 followed by a decrease of Tr (d2)at larger d2. Such a nonmonotonic thickness dependence of Tr (d2) results from the interplay of the …
Dynamics Of Phase Transitions On Low-Index Metal Surfaces, Bo Lin
Dynamics Of Phase Transitions On Low-Index Metal Surfaces, Bo Lin
Electrical & Computer Engineering Theses & Dissertations
The surface superheating and phase transitions at the low-index surface of metal were investigated using conventional continuous and 100-ps time-resolved reflection high-energy electron diffraction. Three metal surfaces, In(111), Au(110) and Pb(111), have been investigated in this work. The high temperature behavior of the In(111) surface was investigated using reflection high-energy electron diffraction with 100-ps temporal resolution. The change of surface vacancy density on In(111) is observed from 300 K to near the bulk melting point. The vacancy-formation energy of In(111) surface is estimated from experimental results. The surface vacancy density is observed to increase with temperature; however, the average random …