A natural indirect-to-direct band gap transition in artificially fabricated MoS₂ and MoSe₂ flowers

Abstract

Twisted bilayer (tB) transition metal dichalcogenide (TMD) structures formed by two pieces of a periodic pattern overlaid with a relative twist manifest novel electronic and optical properties and correlated electronic...

https://2DMat.ChemDX.org: Experimental data platform for 2D materials from synthesis to physical properties

“…85,86 These mapping techniques offer insights into material quality, defects, and variations in the properties, which are crucial for device optimization. 85–90 The position-mapped PL/Raman data were acquired from various exfoliated and chemical vapor deposition-grown transition metal dichalcogenides. The PL/Raman measurements typically require a significant amount of time for high-resolution analysis, and applying ML techniques can potentially reduce the measurement time with our systematic datasets.…”

Second-harmonic generation in 2D moiré superlattices composed of bilayer transition metal dichalcogenides

“…We first discussed the interlayer coupling strength of MSLs by comparing their interlayer distance, exfoliation energy, and interlayer charge transfer because these angle-dependent properties are the underlying factors that influence the band structures and optical properties of MSLs. 13,42–46 Next, we analysed the band structure and band gap of MSLs. As the threshold of light absorption and dielectric function, the optical band gap also determines the value of SHG susceptibility to some extent.…”