1Institute for Nuclear Research, 252028 Prospekt
Nauki 47, Kiev-28, Ukraine
2Institute for Theoretical Physics, University of
Regensburg, 93040 Regensburg, Germany
3The Niels Bohr Institute, 2100 Copenhagen, Denmark
4Faculty of Science, Himeji Institute of Technology,
Kamigori, Ako-gun, Hyogo, 678-12, Japan
Received 18 August 1997, accepted 8 September 1997
Keywords: Shell structure in metal clusters and nuclei; single-particle level density; Periodic orbit theory; Gutzwiller's trace formula
1Institut für Physik, Universität Augsburg, D-86135 Augsburg, Germany
Received 26 September 1997, revised version 4 November 1997, accepted 12 November 1997
Keywords: Charge-density-wave; Disorder; Functional methods