Nearly flat Fermi surfaces and the static wavenumber dependent susceptibility of metals |
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Authors: | WR Fehlner PD Loly |
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Institution: | Department of Physics, University of Manitoba, Winnipeg, Manitoba, Canada, R3T 2N2 |
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Abstract: | The logarithmic divergence in χ(q) associated with the nesting of planar Fermi surfaces is shown to degenerate into a smooth absolute maximum separated from a simple Kohn singularity for Fermi surfaces of finite curvature. Applications to antiferromagnetic ordering in Eu and ‘giant’ Kohn anomalies are discussed. |
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