Incipient quantum melting of the one-dimensional Wigner lattice

Fratini, S.; Valenzuela, B.; Baeriswyl, Dionys

doi:10.1016/j.synthmet.2003.10.030

Back

Journal article

Incipient quantum melting of the one-dimensional Wigner lattice

Fratini, S. Laboratoire d’Etudes des Propriétés Electroniques des Solides, CNRS, Grenoble, France
Valenzuela, B. Instituto de Ciencia de Materiales, CSIC, Madrid, Spain
Baeriswyl, Dionys Theoretical Physics Group, Physics Department, University of Fribourg, Switzerland

16.01.2004

Published in:

Synthetic Metals. - 2004, vol. 141, no. 1-2, p. 193-196

English A one-dimensional tight-binding model of electrons with long-range Coulomb interactions is studied in the limit where double site occupancy is forbidden and the Coulomb coupling strength V is large with respect to the hopping amplitude t. The quantum problem of a kink–antikink pair generated in the Wigner lattice (the classical ground state for t=0) is solved for fillings n=1/s, where s is an integer larger than 1. The pair energy becomes negative for a relatively high value of V, Vc/t≈s³. This signals the initial stage of the quantum melting of the Wigner lattice.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language