Fermi surface of superconducting LaFePO determined from quantum oscillations.
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.
Coldea
A I
AI
H.H. Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol, UK.
Fletcher
J D
JD
Carrington
A
A
Analytis
J G
JG
Bangura
A F
AF
Chu
J-H
JH
Erickson
A S
AS
Fisher
I R
IR
Hussey
N E
NE
McDonald
R D
RD