Electron-positron momentum densities in Y, reconstructed from two-dimensional angular correlation of annihilation radiation spectra, are compared with the theoretical predictions of fully-relativistic augmented plane-wave calculations. Knowledge of the theoretical densities and of the effects on them of certain symmetry selection rules has allowed us to separate two hole Fermi sur-faces in the third and fourth bands and to establish some Fermi momenta for each of them.
@article{arxiv.cond-mat/0202157,
title = {Fermi surface of yttrium},
author = {G. Kontrym-Sznajd and H. Sormann and R. N. West},
journal= {arXiv preprint arXiv:cond-mat/0202157},
year = {2007}
}