Condensed Matter Seminar Series
Josephson Junctions Between Unconventional Superconductors and Their Arrays
Dmitri Khveshchenko
Univ. North Carolina, Chapel Hill
Thursday April 5, 11:00 am, Room 298, Physics Building
Abstract: We
study arrays of mesoscopic junctions made out of gapless unconventional
superconductors where the tunneling processes of both particle-hole and
Cooper pairs give rise to a strongly retarded effective action which,
contrary to the standard case, can not be readily characterized in
terms of a local Josephson energy. This action can be relevant for,
e.g., grain boundary and c-axis junctions in layered high-Tc
superconductors. By using a novel functional representation, we
describe emergent collective phenomena in this system, ascertain its
phase diagram, and compute electrical conductivity.
Host: Harold Baranger