Abstract
AbstractThe Fermi surface (FS) in paramagnetic ErGa3 is estimated by various band structure methods: linear muffin‐tin orbital (LMTO) in the atomic sphere approximation (ASA) and three new codes contained full potential (FP) instead of ASA, namely FP‐LMTO, FP linear augmented plane wave (FLAPW), and FP local orbitals (FPLO) methods. Three dimensional (3D) electron‐positron (e‐p) momentum densities ρ (p) are reconstructed from two dimensional (2D) angular correlation of annihilation radiation (ACAR) spectra measured for paramagnetic ErGa3. Reconstructed densities in the extended p‐space, folded into the reduced k‐space, are compared with the theoretical results. Unfortunately, none of these modern FP codes is able to give satisfying description of the experimental data that are in perfect agreement with previous LMTO‐ASA results. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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