https://doi.org/10.1140/epjb/e2004-00305-8
Formation of polaron clusters
1
Coherentia-INFM, UdR di Napoli, via Cinthia 80126 Naples, Italy
2
Dipartimento di Scienze Fisiche, Università “Federico II”
di Napoli, via Cinthia 80126 Naples, Italy
3
Agrophysical Institute, St. Petersburg 195220, Russia
Corresponding author: a perroni@na.infn.it
Received:
6
May
2004
Published online:
12
October
2004
The formation of spherical polaron clusters is studied within the Fröhlich 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.
PACS: 71.38.-k – Polarons and electron-phonon interactions
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2004
