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HL: Fachverband Halbleiterphysik

HL 40: 2D Materials and Heterostructures: Magnetic Properties

HL 40.1: Talk

Thursday, March 21, 2024, 09:30–09:45, EW 201

Optical properties of quasi-one-dimensional materials — •Thorsten Deilmann — Institute of Solid State Theory, University of Münster, Germany

Many of the atomically thin materials used today, such as graphene or MoS₂, exhibit a high in-plane symmetry. Anisotropic crystals unite the fascinating characteristics of the confined in-plane physics with their reduced crystal symmetry. This paves the way for polarization-sensitive applications, such as optical logic circuits operating in the infrared spectral region.

Here, we investigate and compare the doping-dependent optical properties of three different classes of materials from a first-principles perspective. Besides the well-known black phosphorus and the transition metal dichalcogenides ReS₂ and ReSe₂, we study the in-plane ferromagnetic CrSBr. Although all materials have a distinct anisotropy, the influence on the optical properties is intimately linked to the nature of the electronic quantum states.

Keywords: GW-BSE; TMDC; CrSBr; quasi-1D; 2D