Infrared magneto-spectroscopy of two-dimensional and three-dimensional massless fermions: A comparison
2015
Abstract
Here, we report on a magneto-optical study of two distinct systems hosting massless fermions-two-dimensional graphene and three-dimensional HgCdTe tuned to the zero band gap condition at the point of the semiconductor-to-semimetal topological transition. Both materials exhibit, in the quantum regime, a fairly rich magneto-optical response, which is composed from a series of intra-and interband inter-Landau level resonances with for massless fermions typical root B dependence.
The impact of the system's dimensionality and of the strength of the spin-orbit interaction on the optical response is also discussed. (C) 2015 AIP Publishing LLC.