| Numéro |
J. Phys. IV France
Volume 131, December 2005
|
|
|---|---|---|
| Page(s) | 233 - 234 | |
| DOI | https://doi.org/10.1051/jp4:2005131059 | |
| Publié en ligne | 18 janvier 2006 | |
International Workshop on Electronic Crystals
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 233-234
DOI: 10.1051/jp4:2005131059
1 Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
2 Present address: Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany
© EDP Sciences 2005
S. Brazovskii, P. Monceau and N. Kirova
J. Phys. IV France 131 (2005) 233-234
DOI: 10.1051/jp4:2005131059
Exchange coupling in a one-dimensional Wigner crystal
A.D. Klironomos1, R.R. Ramazashvili1, 2 and K.A. Matveev11 Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
2 Present address: Max-Planck-Institut für Physik komplexer Systeme, Nöthnitzer Str. 38, 01187 Dresden, Germany
Abstract
We consider a long quantum wire at low electron densities. In this
strong interaction regime a Wigner crystal may form, in which electrons
comprise an antiferromagnetic Heisenberg spin chain. The coupling
constant J is exponentially small, as it originates from tunneling of
two neighboring electrons through the segregating potential barrier. We
study this exponential dependence, properly accounting for the many-body
effects and the finite width of the wire.
© EDP Sciences 2005