Premium
Screening singularities and Fermi surface effects in the diffuse scattering from alloys
Author(s) -
Moss S. C.,
Walker R. H.
Publication year - 1975
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889875009727
Subject(s) - fermi surface , condensed matter physics , scattering , alloy , electron , physics , gravitational singularity , fermi gamma ray space telescope , fermi gas , fermi level , atomic physics , chemistry , quantum mechanics , organic chemistry
The formalism for the modification of the pair interaction energy between the atoms of a binary alloy due to the electron‐ion interaction as modified by the electron–electron interaction, is developed to lowest order. In a manner analogous to the treatment of Krivoglaz it is shown how the fluctuation‐dependent part of the alloy pair energy contains a contribution from ɛ( q ), the dielectric function for the alloy, which in turn reflects singularities at ɛ(2 k F ), where k F is the Fermi wavevector. The strength of these singularities and their contribution to the diffuse scattering of radiation is discussed and recent experimental observations of several groups on `imaging' the Fermi surface in this manner are presented.