Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
1999-10-26
Physics
Condensed Matter
Strongly Correlated Electrons
15 pages, 9 figures included in the manuscript, to be published in EPJB
Scientific paper
10.1007/s100510050111
The melting of a Wigner Crystal of electrons placed into a host polar material is examined as a function of the density and the temperature. When the coupling to the longitudinal optical modes of the host medium is turned on, the WC is progressively transformed into a polaronic Wigner Crystal. We estimate the critical density for crystal melting at zero temperature using the Lindeman criterion. We show that above a certain critical value of the Frohlich electron-phonon coupling, the melting towards a quantum liquid of polarons is not possible, and the insulator-to-metal transition is driven by the ionization of the polarons (polaron dissociation). The phase diagram at finite temperature is obtained by making use of the same Lindeman criterion. Results are also provided in the case of an anisotropic electron band mass, showing that the scenario of polaron dissociation can be relevant in anisotropic compounds such as the superconducting cuprates at rather moderate e-ph couplings.
Fratini Simone
Quemerais Pascal
No associations
LandOfFree
Melting of a Wigner Crystal in an Ionic Dielectric does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Melting of a Wigner Crystal in an Ionic Dielectric, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Melting of a Wigner Crystal in an Ionic Dielectric will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-24470