title: Fermi surface of superconducting LaFePO determined from quantum oscillations.
abstract: We report extensive measurements of quantum oscillations in the normal state of the Fe-based superconductor LaFePO, (T(c) approximately 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 approximately 2. The quasi-two-dimensional Fermi surface consists of nearly nested electron and hole pockets, suggesting proximity to a spin or charge density wave instability.
authors.affiliation: H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, UK.
authors.forename: A I
authors.initials: AI
authors.lastname: Coldea
authors.forename: J D
authors.initials: JD
authors.lastname: Fletcher
authors.forename: A
authors.initials: A
authors.lastname: Carrington
authors.forename: J G
authors.initials: JG
authors.lastname: Analytis
authors.forename: A F
authors.initials: AF
authors.lastname: Bangura
authors.forename: J-H
authors.initials: JH
authors.lastname: Chu
authors.forename: A S
authors.initials: AS
authors.lastname: Erickson
authors.forename: I R
authors.initials: IR
authors.lastname: Fisher
authors.forename: N E
authors.initials: NE
authors.lastname: Hussey
authors.forename: R D
authors.initials: RD
authors.lastname: McDonald