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NEWS
Dr. Doug Ingram, in recognition of his outstanding teaching over many years at TCU, won the Deans’ 2011 Teaching Award, which was presented to him at the December Commencement.
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SEMINARS
Friday, February 10th at 1:30 p.m. in SWR 357
The Phase Diagram of the High Temperature Superconductor YBa2Cu3O7-δ with Point and Columnar Defects.
Andra Troncalli
Physics Department
Austin College
Abstract
The high temperature superconductor YBa2Cu3O7-δ still holds a lot of interests for researchers, although it was discovered more than twenty years ago. Clean single crystals of YBa2Cu3O7-δ display a first-order phase transition from a vortex solid state to a vortex liquid state. In the presence of disorder, the transition is second order, and the solid state is either a vortex glass in the presence of random point defects, or a Bose-glass in the presence of correlated defects. The order of the phase transition and the nature of the vortex solid are not the only ones changing upon the introduction of defects: the pinning anisotropy of the material may change too.
Sponsor: Dr. Strzhemechny
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