252 citations · 803 across the 17 of their papers we have counts for
5 papers · 1 filter
Born Effective Charge Reversal and Metallic Threshold State at a Band Insulator-Mott Insulator Transition
N. Gidopoulos S. Sorella, E. Tosatti
We study the quantum phase transition between a band (``ionic'') insulator and a Mott-Hubbard insulator, realized at a critical value U=Uc in a bipartite Hubbard model with two ine…
Interplay of Orbital Degeneracy and Superconductivity in a Molecular Conductor
Michele Fabrizio, Marco Airoldi, Erio Tosatti
We study electron propagation in a molecular lattice model. Each molecular site involves doubly degenerate electronic states coupled to doubly degenerate molecular vibration, leadi…
Maximum Overheating and Partial Wetting of Nonmelting Solid Surfaces
Francesco D. Di Tolla, Furio Ercolessi, Erio Tosatti
Surfaces which do not exhibit surface melting below the melting point (nonmelting surfaces) have been recently observed to sustain a very large amount of overheating. We present a…
Premelting of Thin Wires
O. Gulseren, F. Ercolessi, E. Tosatti
Recent work has raised considerable interest on the nature of thin metallic wires. We have investigated the melting behavior of thin cylindrical Pb wires with the axis along a (110…
Ultraviolet and soft X--ray photon--photon elastic scattering in an electron gas
R. Martoňák, E. Tosatti
We have considered the processes which lead to elastic scattering between two far ultraviolet or X--ray photons while they propagate inside a solid, modeled as a simple electron ga…