Condensed Matter Seminar "Metallic conduction and superconductivity in the t-J model: Evolution of the spin states from half filling"
Abstract:
Many believe, following Anderson, that the origin of the unusual
behavior of cuprate superconductors
is related to the physics of the undoped phase. However, this connection
has not been established theoretically. I will discuss the properties of
a renormalized Hamiltonian derived recently from the t-J model, which is
required to reproduce the physics at half filling. Despite this
constraint, or, perhaps because of it, the resulting phases agree
qualitatively with those found in underdoped cuprates. I will discuss
the origin of strong-coupling superconductivity in the model. One
property that is central to the physics of cuprates is the
two-dimensional nature of the normal state, although the superconductor
and the other nearby phases show the expected 3D behavior. Remarkably,
this "dimensional confinement" of the metal emerges in this theory, not
put in by hand.
Location: Jadwin 303
Date/Time: 08/11/10 at 11:00 am - 08/11/10 at 6:00 pm
Category: Condensed Matter Seminar
Department: PCTS