Band structure of LaB6 by an algorithm for filtering reconstructed electron-positron momentum densities
Abstract
A new method (NM) for filtering three-dimensional reconstructed densities is proposed. The algorithm is tested with simulated spectra and employed to study the electronic structure of the rare-earth compound LaB6. For this system, momentum densities are reconstructed from theoretical and experimental two-dimensional angular correlation of electron-positron annihilation radiation (2D ACAR) spectra. The experimental results are in good agreement with the band structure calculated with the full-potential linearized augmented-plane-wave (FLAPW) method within the local-density approximation (LDA), apart from the detection of small electron pockets in the 15th band. It is also shown that, unlike the electron-positron enhancement, the electron-electron correlations affect noticeably the momentum density.
Keywords
Cite
@article{arxiv.cond-mat/0409460,
title = {Band structure of LaB6 by an algorithm for filtering reconstructed electron-positron momentum densities},
author = {G. Kontrym-Sznajd and M. Samsel-Czekala and M. Biasini and Y. Kubo},
journal= {arXiv preprint arXiv:cond-mat/0409460},
year = {2007}
}