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Quantum oscillations in an iron-based superconductor

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I will present extensive measurements of quantum oscillations in the normal state of the Fe-based superconductor, LaFePO, (Tc = 6 K) using low temperature torque magnetometry and transport in high static magnetic fields measured in Bristol and Tallahassee (up to 45 T). Our results show that the Fermi surface is in broad agreement with the band-structure calculations with quasiparticle mass enhanced by a factor of two. The quasi-two dimensional Fermi surface consist of nearly-nested electron and hole pockets, suggesting proximity to a spin/charge density wave instability.

This talk is part of the Quantum Matter Seminar series.

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