57th CEMS Colloquium

Title

Neutron scattering studies on several exotic superconducting materials

Abstract

 By using various neutron diffraction/scattering techniques, I have been studying several strongly correlated electron systems. Among the techniques, small angle neutron scattering (SANS) is a useful tool to investigate superconducting state by imaging vortex lattice (VL). (Because the VL state is much affected by underlying superconducting properties of host crystal and so SANS results can give information on the superconducting gap structure, the pairing state etc.)

So far, we performed the SANS experiments on several superconductors, including ErNi₂B₂C, YNi₂B₂C, CeCoIn₅, KFe₂As₂, BaFe₂(As,P)₂, Sr₂RuO₄. For example, in ErNi₂B₂C, we explored a possibility of spontaneous vortex state and in CeCoIn₅ we studied an effect of strong Pauli paramagnetism on its superconductivity. In this colloquium, I would like to show some data that prove the power of SANS technique to study superconductors and introduce our new projects on PdBi₂, LaNiC₂ and skyrmion dynamics.