Events Calendar

Superoxygenation and Superconductivity..., J. Wei, UofT

Date:
Thursday, November 23, 2017
Time:
1:30 pm - 2:30 pm
Location:
Physics & Astronomy Building (PAB)
Room: 100
Cost:
Free

Department of Physics and Astronomy

PHYSICS & ASTRONOMY COLLOQUIUM

Dr. John Y. T. Wei

Department of Physics
University of Toronto

“Superoxygenation and Superconductivity in Copper Oxide Thin Films”

ABSTRACT

Copper oxides astonished the world decades ago by showing superconductivity above liquid-nitrogen temperature. Since then, the quest for room-temperature superconductivity has proliferated among a variety of materials and sample forms, guided by a growing knowledge base and also progressing by serendipity. One strategy for discovering new superconductors is to apply extreme thermodynamics, particularly pressure, to access and stabilize exotic phases of materials. In this talk, I will report on progress along one such front, namely the use of superoxygenation on the canonical copper oxide YBa2Cu3O7-δ in epitaxial thin-film form. The guiding principles are: to increase the chemical complexity by enhanced oxidation; and to tailor the basic Cu-O lattice components, as the structural DNA of high-temperature superconductivity. Our approach is informed by a fundamental tenet of nanomaterial synthesis in exploiting the high surface-to-volume ratio of thin films, and also motivated by a recent ultrafast optical spectroscopy study showing transient evidence for room-temperature superconductivity in YBa2Cu3O6+x.

STUDENTS – after the talk, you’re encouraged to meet with the speaker in PAB 141 (Reading room).
COFFEE – coffee and cookies will be available in the 2nd floor Atrium lounge at 1:15 p.m.
CELL PHONES – as a courtesy to the speaker and audience, please set your cellphones to “silent” mode. Thanks!
Host:
Prof. G. Fanchini
Contact:
Jodi Guthrie - Assistant to the Chair
jodi@uwo.ca
519-661-2111 ext. 86438
Event Type:


Powered by Blackbaud
nonprofit software