Thursday, March 22, 2007, 1:30 pm — Small seminar room, Bldg. 510
Experiments have established that the order parameter in the high-Tc
cuprate superconductors exhibits d-wave symmetry, vanishing at four
points on the Fermi surface. Near each of these four gap nodes,
quasiparticles are easily excited and exhibit the Dirac energy spectrum
characteristic of massless relativistic fermions. In this seminar, I
will discuss two calculations of the transport properties of these Dirac
quasiparticles. The first is a Kubo formula calculation of low
temperature thermal transport in the presence of coexisting charge
order. There is now strong evidence that charge order coexists with
superconductivity in the underdoped cuprates. In the second, we turn on
a magnetic field and consider the scattering of quasiparticles from
magnetic vortices, calculating the differential cross section.
Hosted by: Robert Konik
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