Diamagnetism in disordered graphene

Details Diamagnetism in disordered graphene Diamagnetism in disordered graphene

2007-05-16

arxiv.org/abs/0705.2322v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 4 figures, to appear in Physical Review B

Scientific paper

10.1103/PhysRevB.75.235333

The orbital magnetism is studied in graphene monolayer within the effective mass approximation. In models of short-range and long-range disorder, the magnetization is calculated with self-consistent Born approximation. In the zero-field limit, the susceptibility becomes highly diamagnetic around zero energy, while it has a long tail proportional to the inverse of the Fermi energy. We demonstrated how the magnetic oscillation vanishes and converges to the susceptibility, on going from a strong-field regime to zero-field. The behavior at zero energy is shown to be highly singular.

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