The possible origin of incommensurate spin textures in HTSC

K. V. Mitsen; O. M. Ivanenko

doi:10.1140/epjb/e2006-00285-7

EPJ

The possible origin of incommensurate spin textures in HTSC

K. V. Mitsen^a and O. M. Ivanenko

Lebedev Physical Institute RAS, 119991 Moscow, Russia

Received: 7 September 2005
Revised: 16 May 2006
Published online: 31 July 2006

Abstract

An model of La_2-xSr_xCuO₄ explaining the features of incommensurate spin textures without any assumption of stripe formation is proposed. The foundations of this model are the mechanism of negative-U center formation proposed earlier and the concept of specific ordering of doped ions. It is shown that within the framework of the proposed model the features of “stripe” textures of La_2-xSr_xCuO₄ reflect exclusively the geometrical relations existing in a square lattice and the competition between different types of doped hole ordering.

PACS: 74.20.Mn – Nonconventional mechanisms (spin fluctuations, polarons and bipolarons, resonating valence bond model, anyon mechanism, marginal Fermi liquid, Luttinger liquid, etc.) / 74.72.Dn – La-based cuprates / 75.10.-b – General theory and models of magnetic ordering