Conférence présentée par Doug Bonn, University of British Columbia

Abstract:The discovery of high temperature superconductivity in a family of iron-based compounds has generated a new wave of research into unconventional superconductivity. As happened previously following the discovery of the cuprate superconductors, much of the effort has focussed on determining whether or not this is a distinct, new type of superconducting state and what that might say about the superconducting mechanism. This talk will introduce the use of scanning tunnelling microscopy as a tool for exploring the superconducting state of one member of the iron compounds, LiFeAs, showing its use in measurements of superconducting gaps and defect-induced bound states. I will then introduce quasiparticle interference as a means to demonstrate that LiFeAs is an s+- superconductor, a new superconducting state driven by electronic interactions.

Le café est servi dès 11 h 30.