“Electronic Interactions on Moiré 2D van der Waals Heterostructures"

Recently, the combination of graphene (G) and other two-dimensional (2D) materials, such as transition metal dichalcogenides, has attracted increasing interest. This innovative approach not only promises the development of future electronics and photonics, but also holds potential for the creation of innovative devices, sensors, and biochemical applications. These heterostructures, with their unique mini gaps and electronic deviations, offer unprecedented physical properties, potentially revolutionizing the field. The introduction of a new parameter, the interlayer rotation angle, through vertical stacking, modulates the electronic interactions, characterizing the moiré potential. By employing first-principles methods, such as density functional theory (DFT), we can delve into the electronic properties of these novel 2D materials, where the use of periodic boundary conditions is highly desirable by constructing a supercell (SC) of the bilayer heterostructure.

Our use of DFT and the general unfolding method has allowed us to uncover the crucial physical effects of the mutual interactions between G/G, hBN/hBN, and G/WS2 heterostructures with different interlayer angles. In this presentation, we delve into the origin of the mini gaps for G/G and G/WS2, the excitonic optical spectra of hBN/hBN, and the molecular adsorption on G/G, and their evolution as a function of the angle, all of which are significant findings in the field of 2D materials research.

Transmisión en vivo vía bit.ly/YouTube_ICF

Participante: Dra. Cecilia Noguez Garrido

Institución: Instituto de Física, UNAM

Fecha y hora: Este evento terminó el Miércoles, 05 de Marzo de 2025