Speaker
Graeme Luke
(McMaster University)
Description
There has been a resurgence of interest in superconductivity since the discovery of high temperature superconductivity in the cuprates. As a result, a variety of new superconductors with high transition temperatures and other interesting properties have been discovered. The muon spin rotation/relaxation ($\mu$SR) technique is an extremely sensitive probe of magnetic fields in materials and has been used to determine electronic/magnetic phase diagrams and measure the London penetration depth.
Measurements in zero magnetic field ZF-$\mu$SR allowed us to identify a broken time reversal symmetry superconducting state in Sr$_2$RuO$_4$. The most likely superconducting state in this system is the chiral p-wave state which could potentially be employed for quantum computation. I will describe our transverse field TF-$\mu$SR measurements of the vortex lattice in Sr$_2$RuO$_4$ determining the magnetic field penetration depth to further characterize its superconducting state. I will also describe some of our recent measurements of other novel superconductors including iron pnictides, the non-centrosymmetric CaIrSi$_3$ and the strong spin-orbit coupled Pt$_{0.05}$Ir$_{0.95}$Te$_2$.
Primary author
Graeme Luke
(McMaster University)
