Non-collinear coupling between magnetic adatoms in carbon nanotubes

Details Non-collinear coupling between magnetic adatoms in carbon nanotubes Non-collinear coupling between magnetic adatoms in carbon nanotubes

2007-02-28

arxiv.org/abs/cond-mat/0703007v1

Physics

Condensed Matter

Other Condensed Matter

13 pages, 5 figures, submitted to PRB

Scientific paper

10.1103/PhysRevB.76.085401

The long range character of the exchange coupling between localized magnetic moments indirectly mediated by the conduction electrons of metallic hosts often plays a significant role in determining the magnetic order of low-dimensional structures. In addition to this indirect coupling, here we show that the direct exchange interaction that arises when the moments are not too far apart may induce a non-collinear magnetic order that cannot be characterized by a Heisenberg-like interaction between the magnetic moments. We argue that this effect can be manipulated to control the magnetization alignment of magnetic dimers adsorbed to the walls of carbon nanotubes.

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