Quantum oscillation experiments on iron pnictides LaFe$_{2}$P$_{2}$ and CeFe$_{2}$P$_{2}$
ORAL
Abstract
We investigated the quantum oscillations of the non-superconducting iron pnictides LaFe$_{2}$P$_{2}$ and CeFe$_{2}$P$_{2}$. Those compounds are isostructural to the high-temperature superconductor (Ba$_{1-x}$K$_{x}$)Fe$_{2}$As$_{2}$ [M. Rotter et al., Phys. Rev. Lett. 101, 107006 (2008)]. Measurements have been carried out using a torque cantilever in fields up to 35 T. Angular-dependent observations of the extremal Fermi surface areas shows a good agreement with our density functional theory calculation using GGA+U functional, which has been used to constructed the Fermi surfaces. We found significant differences between the Fermi surfaces of the two compounds, with LaFe$_{2}$P$_{2}$ showing a much more three dimensional Fermi surface.
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