Thursday, April 18, 2013

1304.4755 (C. F. Hermanns et al.)

Magnetic coupling of porphyrin molecules through graphene    [PDF]

C. F. Hermanns, K. Tarafder, M. Bernien, A. Krüger, Y. -M. Chang, P. M. Oppeneer, W. Kuch
Graphene is expected to complement todays Si-based information technology. In particular, magnetic molecules in contact with graphene constitute a tantalizing approach towards organic spin electronics because of the reduced conductivity mismatch at the interface. In such a system a bit is represented by a single molecular magnetic moment, which must be stabilized against thermal fluctuations. Here, we show in a combined experimental and theoretical study that the moments of paramagnetic Co-octaethylporphyrin (CoOEP) molecules on graphene can be aligned by a remarkable antiferromagnetic coupling to a Ni substrate underneath the graphene. This coupling is mediated via the \pi\ electronic system of graphene, while no covalent bonds between the molecule and the substrate are established.
View original: http://arxiv.org/abs/1304.4755

No comments:

Post a Comment