title: Disorder effect on the integer quantum Hall effect in trilayer graphene.
abstract: We numerically investigate the disorder effect on the integer quantum Hall effect in a trilayer graphene (TLG) system by use of the Kubo formula. For a clean sample, both Bernal (ABA) and rhombohedral (ABC) stacked TLGs display the same quantum rule with abnormal quantized Hall plateaus σxy = νe(2)/h (ν =± 6, ± 10, ± 14,…) in the band center and normal quantized Hall plateaus at the band edges. In the presence of disorder, the Hall plateaus become obscure and the higher plateaus disappear first with the increase of the disorder; however, the Hall plateaus of the ABA-stacked TLG are destroyed more readily in comparison with the ABC-stacked one. The longitudinal conductance minimums of the system corresponding to the Hall plateaus become narrower and thinner with disorder, and those of the ABC-stacked TLG are comparatively more stable than those of the ABA structure. The findings indicate that the l = 3 chiral quasiparticles with cubic energy dispersion in ABC-stacked TLG have comparatively stronger immunity to the disorder than the l = 1 and 2 chiral quasiparticles in the ABA counterpart.
authors.affiliation: Department of Physics, Southeast University, Nanjing 210096, People's Republic of China. Department of Physics, Yancheng Institute of Technology, Jiangsu 224051, People's Republic of China.
authors.forename: H Y
authors.initials: HY
authors.lastname: Tian
authors.forename: R
authors.initials: R
authors.lastname: Ma
authors.forename: K S
authors.initials: KS
authors.lastname: Chan
authors.forename: J
authors.initials: J
authors.lastname: Wang