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Anomalies in the Phonon Spectra and the Fermi Surface of the Random Substitutional Alloy Cu 0.9 Ni 0.1
Author(s) -
Rumyantsev A. Yu.,
Mitrofanov N. L.,
Ivanov A. S.,
Chernoplekov N. A.,
Weiss L.,
Eschrig H.,
Richter R.
Publication year - 1987
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.2221430222
Subject(s) - fermi surface , condensed matter physics , phonon , alloy , fermi level , fermi gamma ray space telescope , spectral line , materials science , physics , quantum mechanics , electron , superconductivity , composite material
With a full self‐consistent LCAO‐CPA‐calculation of the Bloch spectral function (representing the electronic bandstructure) of the random substitutional alloy Cu 0.9 Ni 0.1 , statements regarding the existence and the shape of the Fermi surface are given. The relation of the Fermi surface with various kinds of anomalies in the phonon dispersion curves as pointed out in previous papers is used to compare such anomalies as measured by neutron spectroscopy in the (110)‐plane of this alloy with the calculations. The experimental results show that the Fermi surface intersecting this plane is somewhat less extended than coming out from this calculation.