Abstract
We investigate the properties of pseudo-one-dimensional systems which exhibit Peierls instability at , where is the Fermi energy as measured from the middle of a conduction band. We show that, except at or , the giant Kohn anomalies of the phonon spectrum do not occur at . For , where is the bandwidth, decreases as increases, and, for , . As further increases towards , the decrease of towards zero need not in general be monotonic. The neutron scattering differential cross section shows a peak with magnitude proportional to .
- Received 27 March 1974
DOI:https://doi.org/10.1103/PhysRevB.11.4272
©1975 American Physical Society