TODAY – @ 1:30 and 4 p.m.
TWO talks by Dr. John Berlinsky:
Poster: http://www.physics.uwo.ca/colloquia/Colloquia%20Notices/2011_2012/BERLINSKY%20Colloquium.pdf
Western University
DEPARTMENT OF PHYSICS AND ASTRONOMY
PHYSICS & ASTRONOMY COLLOQUIUM
Date: Thursday, 19th April 2012
Time: 1:30 p.m.
Location: Physics & Astronomy Seminar Room 22
Dr. John Berlinsky
Perimeter Institute for Theoretical Physics
“Quantum Oscillations in High Temperature Superconductors”
ABSTRACT
High temperature superconductivity occupies one region of the phase diagram of the rare earth cuprates, which also includes regions of antiferromagnetism at low doping and pseudogap, stripe, and strange metal behaviour for intermediate doping, as well as a normal Fermi liquid at high doping. These are clearly strongly correlated systems and, since the beginning, much of this strange behaviour has been interpreted in terms of Mott-Hubbard physics. And so the discovery of quantum oscillations, which are usually a clear signature of normal Fermi liquid-like behaviour, came as something of a surprise which deepened the mystery of high Tc, rather than clarifying it. Furthermore it was difficult to understand the observed frequencies of the quantum oscillations without invoking some kind of translational symmetry breaking and superlattice model. In this talk we will describe the general situation of the phase diagram and the observations of quantum oscillations and then present some recent results for a simple model of quantum oscillations arising from superconducting stripes.
Coffee & cookies will be available, courtesy of PASA.
In addition, Dr. Berlinsky will make a second presentation later in the day:
Date: Thursday, 19th April 2012
Time: 4:00 p.m.
Location: Physics & Astronomy Classroom 117
Dr. John Berlinsky
Perimeter Institute for Theoretical Physics
“Perimeter Scholars International (PSI) Information Session”
Perimeter Scholars International is a one-year Masters level course in Theoretical Physics designed to bring highly qualified, highly motivated graduate students to the cutting edge of theoretical physics in an intense, interactive learning environment.