Proposal to determine the Fermi-surface topology of a doped iron-based superconductor using bulk-sensitive Fourier-transform Compton scattering

Yung Jui Wang, Northeastern University
Hsin Lin, Northeastern University
B. Barbiellini, Northeastern University
P. E. Mijnarends, Northeastern University
S. Kaprzyk, Northeastern University
R. S. Markiewicz, Northeastern Univeristy
A. Bansil, Northeastern University

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Originally published in Physical Review B v.81 (2010): 092501. DOI: 10.1103/PhysRevB.81.092501

Abstract

We have carried out first-principles calculations of the Compton scattering spectra to demonstrate that the filling of the hole Fermi surface in LaO₁₋ₓFₓFeAs produces a distinct signature in the Fourier-transformed Compton spectrum when the momentum transfer vector lies along the [100] direction. We thus show how the critical concentration x_c