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SUMMARY:Special CM Seminar: Rhombohedral graphene: a tunable platform for unconventional superconductivity and collective modes\, Etienne Lantagne-Hurtubise\, Université de Sherbrooke
DESCRIPTION:Speaker: Etienne Lantagne-Hurtubise\, Université de Sherbrooke \nTime: 1:00-2:00pm \nLocation: BRIM 311 \nAbstract: Rhombohedral graphene multilayers are clean and highly-tunable 2D materials that showcase a multitude of symmetry-broken insulating\, metallic and superconducting phases at low temperatures. Their rich phase diagram can further be modified via proximity to transition metal dichalcogenides such as WSe2\, which induce spin-orbit coupling in the graphene layers and lead to a dramatic enhancement of superconductivity. I will first present Hartree-Fock phase diagrams for these systems\, highlighting a spin-canted magnetic phase consistent with recent nano-SQUID experiments. I will then describe a pairing mechanism based on the low-energy collective spin modes (or magnons) associated with spin canting\, which could explain spin-orbit-enhanced superconductivity in these systems. Finally\, I will show how the valley-polarized superconductors recently reported in rhombohedral tetra- and penta-layer graphene could host superconducting collective modes accessible in linear optical spectroscopy.
URL:https://qmi.miffanytark.com/event/special-cm-seminar-rhombohedral-graphene-a-tunable-platform-for-unconventional-superconductivity-and-collective-modes-etienne-lantagne-hurtubise-universite-de-sherbrooke/
CATEGORIES:CM Seminar
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