2007/12/17 by Mikito Koshino, Tsuneya Ando · 1 citation
Physics and Astronomy · #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.76.085425
published as Physical Review B 76, 085425 (2007) · 12 pages, 5 figures
arxiv created 2007/12/17 · arxiv updated 2009/12/01
We present a theoretical study on the orbital magnetism in multilayer graphenes within the effective mass approximation. The Hamiltonian and thus susceptibility can be decomposed into contributions from sub-systems equivalent to monolayer or bilayer graphene. The monolayer-type subband exists only in odd layers and exhibits a delta-function susceptibility at EF=0. The bilayer-type subband appearing in every layer number gives a singular structure in the vicinity of EF=0 due to the trigonal warping as well as a logarithmic tail away from EF=0. The integral of the susceptibility over energy is approximately given only by the layer number.