Band Structure Effects in the Electronic Properties of Solids Accessible in Neutron Scattering Studies
The introduction of high-flux high-energy pulsed neutron sources may allow the study of electronic transitions and elementary excitation phenomena not previously accessible by inelastic neutron scattering techniques. Magnetic scattering from semiconductors and ferromagnetic transition metals are two important areas of interest from the point of view of this new technique. In order to determine what new information could be obtained from such experiments, it is necessary to carry out rather detailed theoretical calculations of the magnetic cross-section based on realistic band structures. Results of total magnetic cross-section calculations for silicon and germanium based on an empirical pseudopotential description of the electronic band structure are presented and analyzed in terms of proposed experiments in the eV range. In addition, some preliminary results from magnetic scattering calculations for ferromagnetic nickel are given. These calculations are based on energy bands which were previously found the complicated spin dynamics of nickel for relatively low energy and wave-vector transfer. Areas of interest such as the determination of the spin-splitting energy, Stoner modes, and high-energy spin waves are discussed.
KeywordsBand Structure Scatter Cross Section Inelastic Neutron Elementary Excitation Spin Part
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