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Condensed Matter Seminar: Magnetism and Magnetoresistance in Nd-doped CeCoIn5
Speaker Prof. Michel Kenzelmann, Paul Scherrer Institute
Date 5 January 2022 (Wednesday)
Time 15:00 - 16:30
Venue Zoom (online)

I will start with an introduction to the Swiss Spallation Source SINQ, its neutron scattering and imaging instrumentation, and neutron scattering as a method to study quantum materials. After giving a short overview of my research interest, I will focus on my research of CeCoIn5 and its magnetic properties. CeCoIn5 is a heavy-fermion metal that develops Pauli-limited d-wave superconductivity at low temperatures. As a function of magnetic field it develops magnetic order whose origin is not well understood but may be related to the Pauli-limiting effects. I will discuss new data that shows that there must be two different mechanisms at play to generate the same kind of magnetic order in CeCoIn5 with magnetic field or doping. Finally, I will discuss transport data in the normal phase of Nd-doped CeCoIn5 that provides evidence for a new and generic mechanism to select magnetic domains in multi-band tetragonal metals, leading to angular dependent magnetoresistance.

To request for meeting link, please write to phweb@ust.hk.