J. Phys. IV France
Volume 09, Numéro PR10, December 1999
International Workshop on Electronic Crystals
Page(s) Pr10-119 - Pr10-121
International Workshop on Electronic Crystals

J. Phys. IV France 09 (1999) Pr10-119-Pr10-121

DOI: 10.1051/jp4:19991031

Topological coupling of dislocations and magnetization vorticity in spin density waves

S. Brazovski1, 2 and N. Kirova1

1  Laboratoire de Physique Théorique et des Modèles Statistiques, CNRS, bâtiment 100, Université Paris-Sud, 91406 Orsay cedex, France
2  L.D. Landau Institute, Moscow, Russia

The rich order parameter of Spin Density Waves allows for an unusual object of a complex topological nature : a half-integer dislocation combined with a semi-vortex of the staggered magnetization. It becomes energetically preferable to ordinary dislocation due to enhanced Coulomb interactions in the semiconducting regime. Generation of these objects changes the narrow band noise frequency.

© EDP Sciences 1999