Nonmagnetic-defect-induced magnetism in graphene

It is shown that a strong impurity potential induces short-range antiferromagnetic (ferrimagnetic) order around itself in a Hubbard model on a half-filled honeycomb lattice. This implies that short-range magnetic order is induced in monolayer graphene by a nonmagnetic defect such as a vacancy with f...

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Bibliographic Details
Published in:	Journal of the Physical Society of Japan Vol. 76; no. 6; p. 64713
Main Authors:	KUMAZAKI, Hideki, HIRASHIMA, Dai S
Format:	Journal Article
Language:	English
Published:	Tokyo Institute of Pure and Applied Physics 01-06-2007 Physical Society of Japan The Physical Society of Japan
Subjects:	Condensed matter: electronic structure, electrical, magnetic, and optical properties Exact sciences and technology Magnetic properties and materials Magnetic properties of nanostructures Physics Antiferromagnetism Ultrathin films Chemisorption Honeycomb lattices Vacancies Magnetic ordering Magnetic moments Hubbard model Defects Ferrimagnetism Impurities Graphene Short-range order magnetic moment
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Summary:	It is shown that a strong impurity potential induces short-range antiferromagnetic (ferrimagnetic) order around itself in a Hubbard model on a half-filled honeycomb lattice. This implies that short-range magnetic order is induced in monolayer graphene by a nonmagnetic defect such as a vacancy with full hydrogen termination or a chemisorption defect.
ISSN:	0031-9015 1347-4073
DOI:	10.1143/jpsj.76.064713