Electronic structure and magnetic properties of graphitic ribbons

By L. Pisani, J. A. Chan, B. Montanari, Nicholas M. Harrison. 2006

498 citations recorded by the source corpus.

First-principles calculations are used to establish that the electronic structure of graphene ribbons with zigzag edges is unstable with respect to magnetic polarization of the edge states. The magnetic interaction between edge states is found to be remarkably long ranged and intimately connected to the electronic structure of the ribbon. Various treatments of electronic exchange and correlation are used to examine the sensitivity of this result to details of the electron-electron interactions, and the qualitative features are found to be independent of the details of the approximation. The possibility of other stablization mechanisms, such as charge ordering and a Peierls distortion, are explicitly considered and found to be unfavorable for ribbons of reasonable width. These results have direct implications for the control of the spin-dependent conductance in graphitic nanoribbons using suitably modulated magnetic fields.

Subfields: Atomic and Molecular Physics, and Optics, Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/14e1f4cc021a5f3305b030638f8777a226dfebd6

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Atomic and Molecular Physics, and Optics

1. Franco Nori
2. Y. Bliokh
3. V. Freilikher
4. G. Giavaras
5. O. Yazyev
6. A. Rozhkov
7. Sahel Ashhab
8. K. Bliokh

In Electrical and Electronic Engineering

1. G. Giavaras
2. Franco Nori
3. Y. Bliokh
4. V. Freilikher
5. O. Yazyev
6. A. Rozhkov

In Materials Chemistry

1. G. Giavaras
2. Franco Nori
3. Y. Bliokh
4. V. Freilikher
5. O. Yazyev
6. A. Rozhkov
7. Allan H. MacDonald
8. D. Pesin

Citations in the corpus

• Emergence of magnetism in graphene materials and nanostructures (2010, methodology): “Other mechanisms, such as the Peierls distortion, were shown to be inefficient in the case of graphene nanostructures (Pisani et al., 2007).”
• Electronic properties of mesoscopic graphene structures: Charge confinement and control of spin and charge transport (2011, result): “42], it is therefore important to study nanoribbons with non-carbon atoms or functional groups attached to the edges. The case of a zigzag nanoribbon with monohydrogenated edges was discussed in Ref. [83]. Such nanoribbons support edge states and have an edge ferromagnetic moment with antiferromagne”
• Prediction of very large values of magnetoresistance in a graphene nanoribbon device. (2008, unknown): “However, the strength of this interaction falls off rapidl”