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Spin‐dependent momentum density distribution and Fermi surface of Ho via 2D‐ACAR measurements
Author(s) -
Hamid A. S.,
Uedono A.
Publication year - 2004
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200301949
Subject(s) - fermi surface , condensed matter physics , physics , fermi level , electron , fermi gamma ray space telescope , fermi contact interaction , fermi gas , quantum oscillations , paramagnetism , superconductivity , quantum mechanics
The first direct measurements of the spin‐dependent positron–electron momentum density and Fermi surface of Ho are presented. The measurements were performed using two‐dimensional angular correlation of annihilation radiation (ACAR) experiments with reversal magnetic field directions parallel and anti‐parallel to the polarization direction of the positron. The analysis confirmed that two hybrid bands influence the Fermi surface of Ho. They are 5d–6s conduction hybrid bands and partial hybridization of 4f–5d bands. In fact, the measured Fermi surface revealed the behavior of the magnetic electrons. Further, the reciprocal lattice points revealed the electronic spin density distribution behavior. The general layout of the Fermi surface of Ho showed a multiply connected surface as an open hole running along the ΓA axis with minority spin distribution and two electron surfaces centered on K and H points, respectively. Furthermore, this Fermi surface showed anti‐ferromagnetic character. The measured Fermi surface of Ho showed agreement with the results of a previous band structure calculation method. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)