J. Phys. IV France
Volume 09, Numéro PR10, December 1999
International Workshop on Electronic Crystals
Page(s) Pr10-259 - Pr10-261
International Workshop on Electronic Crystals

J. Phys. IV France 09 (1999) Pr10-259-Pr10-261

DOI: 10.1051/jp4:19991065

Quantum and/or thermal melting of a polaron Wigner crystal

S. Fratini and P. Quémerais

Laboratoire d'Études des Propriétés Électroniques des Solides, CNRS, PB. 166, 38042 Grenoble cedex 9, France

We study the properties of a lattice of large polarons at low density, which crystallize due to the long-range Coulomb repulsion. We analyze the insulator-to-metal transition occurring in the system as the density or the temperature increase, and propose a new transition mechanism based on polaron dissociation. Finally, an optical signature for such a mechanism is provided in the limit of strong electron-phonon coupling.

© EDP Sciences 1999