Fermi surface of superconducting LaFePO determined by quantum oscillations

Details Fermi surface of superconducting LaFePO determined by quantum oscillations Fermi surface of superconducting LaFePO determined by quantum oscillations

2008-07-30

arxiv.org/abs/0807.4890v2

Phys. Rev. Lett. 101, 216402 (2008)

Physics

Condensed Matter

Superconductivity

to appear in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.101.216402

We report 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 (45 T). We find that the Fermi surface is in broad agreement with the band-structure calculations with the quasiparticle mass enhanced by a factor ~2. The quasi-two dimensional Fermi surface consist of nearly-nested electron and hole pockets, suggesting proximity to a spin/charge density wave instability.

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