Orbital magnetic susceptibility is calculated for massive Dirac systems, such as graphene with a band gap, and bismuth. Gap opening allows us to relate the singular orbital magnetism of massless Dirac system to the usual magnetism of conventional metal. In gapped graphene, we show that the valley degree of freedom produces Zeeman splitting as a real spin does, and causes Pauli paramagnetism which dominates over Landau diamagnetism. Singular susceptibility of intrinsic graphene can be understood as divergence of those contributions in zero-mass limit. A similar analysis is applied to three-dimensional Dirac systems to explain the strong diamagnetism of bismuth.
|Journal||Journal of Physics: Conference Series|
|Publication status||Published - 2011|
|Event||19th International Conference on the Application of High Magnetic Fields in Semiconductor Physics and Nanotechnology, HMF-19 - Fukuoka, Japan|
Duration: 2010 Aug 1 → 2010 Aug 6
ASJC Scopus subject areas
- Physics and Astronomy(all)