1Institut für Theoretische Physik, Universität zu Köln, Zülpicher Str. 77, D-50937 Köln, Germany
2Fachbereich Physik, Martin-Luther-Universität Halle, Friedemann-Bach-Platz, D-06108 Halle, Germany
+Present address: Departments of Physics, Imperial College, 180 Queen's Gate, London SW7 2BZ, UK
Received 21 February 1996, revised version 10 June 1996, accepted 29 July 1996
Keywords: Disorder; Interfaces; Nonequelibrium phase transitions
1Departamento de Fisica, Universidad de Valladolid, Valladolid 47011, Spain
2Department of Physics, Queen's University, Kingston, Ontario K7L3N6, Canada
Received 28 May 1996, revised version 28 July 1996, accepted 13 August 1996
Keywords: Bimetallic; Clusters; Liquids
1Institut für Theoretische Physik C, RWTH Aachen, D-52056 Aachen, Germany
*Present address: Theoretische Physik III, Universität Augsburg, D-86135 Augsburg, Germany
Received 5 July 1996, accepted 21 August 1996
Keywords: Simplified Hubbard model; Mott-Hubbard transition; Magnetic field
1Depto. de Ciencias Basicas, Area de Fisica, Universidad Autonoma Metropolitana-Azcapotzalco, Av. San Pablo 180, Col. Reynosa Tamaulipas, Mexico D.F., C.P. 02200.
Received 10 May 1996, accepted September 1996
Keywords: Nuclear level density; shell effects; partition functions