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HL: Fachverband Halbleiterphysik

HL 53: 2D Semiconductors and van der Waals Heterostructures V

HL 53.4: Vortrag

Donnerstag, 20. März 2025, 15:45–16:00, H15

Theory of Magnetic Field Dependence of Excitonic Spectra in Atomically Thin Semiconductors — •Michiel Snoeken and Henry Mittenzwey — Technische Universität Berlin, Institut für Theoretische Physik, Nichtlineare Optik und Quantenelektronik, Hardenbergstraße 36, 10623 Berlin, Germany

The linear absorption spectrum of TMDC monolayers under the influence of an in-plane magnetic field is theoretically studied in an excitonic picture. It is shown that in-plane magnetic fields induce a hybridization between spin-bright and spin-dark exciton transitions, resulting in a brightening of spin-dark excitons in the linear absorption spectrum with increasing in-plane field-strength. Numerical evaluation shows that with increasing field strength, not only the energy splitting between bright and dark excitonic resonances increases, but also an impact on the respective excitonic linewidths can be observed. Some limiting cases are investigated analytically, allowing to discuss a detailed physical picture of the magnetic field-dependent excitonic energies and linewidths.

Keywords: TMDC Monolayer; In-plane magnetic field; Absorption Spectrum