Formation of polaron clusters

Authors :: C. A. Perroni
V. K. Mukhomorov
G. Iadonisi
Perroni, CARMINE ANTONIO
Iadonisi, Giuseppe
AND V. K., Mukhomorov
Publication Year :: 2004
Publisher :: Les Ulis: EDP Sciences. 2000- Springer Verlag Germany:Tiergartenstrasse 17, D 69121 Heidelberg Germany:011 49 6221 3450, EMAIL: g.braun@springer.de, INTERNET: http://www.springer.de, Fax: 011 49 6221 345229, 2004.
Abstract: The formation of spherical polaron clusters is studied within the Fr$\ddot{o}$hlich polaron theory. In a dilute polaron gas, using the non-local statistical approach and the polaron pair interaction obtained within the Pekar strong coupling theory, the homogeneous phase results to be unstable toward the appearance of polaron clusters. The physical conditions of formation for the clusters are determined calculating the critical values of electron-phonon interaction for which bound states in the collective polaron potential develop. Finally the sequence in the filling of the states is found and the stability of the clusters is assessed.<br />Comment: 10 pages, 2 tables, 4 figures