Band Structure of Two-dimensional Dirac Semimetal from Cyclotron Resonance

Abstract

Knowing the band structure of materials is one of the prerequisites to understand their properties. Therefore, especially in the last decades, angle-resolved photoemission spectroscopy (ARPES) has become a highly demanded experimental tool to investigate the band structure. However, especially in thin film materials with a layered structure and several capping layers, access to the electronic structure by ARPES is limited. Therefore, several alternative methods to obtain the required information have been suggested. Here, we directly invert the results by cyclotron resonance experiments to obtain the band structure of a two-dimensional (2D) material. This procedure is applied to the mercury telluride quantum well with critical thickness which is characterized by a 2D electron gas with linear dispersion relations. The Dirac-like band structure in this material could be mapped both on the electron and on the hole side of the band diagram. In this material, purely linear dispersion of the hole-like carriers is in contrast to detectable quadratic corrections for the electrons.

arXiv comment18 pages, 6 figures

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Cited by in corpus (7)

• Determination of Electron Band Structure using Temporal Interferometry
• Optical Signatures of Dirac Nodal-lines in NbAs${}_2$
• Band structure of a HgTe-based three-dimensional topological insulator
• Energy spectrum of semimetallic HgTe quantum wells
• Superradiant and transport lifetimes of the cyclotron resonance in the topological insulator HgTe
• All-optical band structure reconstruction and onset of Landau quantization of Dirac fermions
• Landau level spectroscopy in current solid state physics