TY - JOUR
T1 - Indication of flat-band magnetism in theoretically designed nanographite with modified zigzag edges
AU - Kusakabe, K.
AU - Maruyama, M.
AU - Tsuneyuki, S.
AU - Akagi, K.
AU - Yoshimoto, Y.
AU - Yamauchi, J.
N1 - Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2004/5
Y1 - 2004/5
N2 - Based on our theoretical prediction of magnetic nanographite, we examined magnetism in various graphitic structures in nanometer scale using the first-principles calculation. When di-hydrogenated carbon atoms are created at a zigzag edge, high-spin ground states are found in carbon nanorings, which are short zigzag nanotubes, as well as graphene structures. The maximum total spin is proportional to the length of graphene ribbon or the diameter of the nanoring. The magnetism is interpreted as a realization of flat-band ferromagnetism known in the Hubbard model on bipartite lattices.
AB - Based on our theoretical prediction of magnetic nanographite, we examined magnetism in various graphitic structures in nanometer scale using the first-principles calculation. When di-hydrogenated carbon atoms are created at a zigzag edge, high-spin ground states are found in carbon nanorings, which are short zigzag nanotubes, as well as graphene structures. The maximum total spin is proportional to the length of graphene ribbon or the diameter of the nanoring. The magnetism is interpreted as a realization of flat-band ferromagnetism known in the Hubbard model on bipartite lattices.
KW - Edge states
KW - Flat-band ferromagnetism
KW - Nanographite
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U2 - 10.1016/j.jmmm.2003.12.1350
DO - 10.1016/j.jmmm.2003.12.1350
M3 - Article
AN - SCOPUS:23144447437
VL - 272-276
SP - e737-e738
JO - Journal of Magnetism and Magnetic Materials
JF - Journal of Magnetism and Magnetic Materials
SN - 0304-8853
IS - SUPPL. 1
ER -