Redox exfoliated NbS<sub>2</sub>: characterization, stability, and oxidation

Layered franckeite is a natural superlattice composed of two alternating layers of different compositions, SnS2- and PbS-like. This creates incommensurability between the two species along the planes of the layers, resulting in spontaneous symmetry-break periodic ripples in the a-axis orientation. Nevertheless, natural franckeite heterostructure has shown potential for optoelectronic applications mostly because it is a semiconductor with 0.7 eV bandgap, air-stable, and can be easily exfoliated down to ultrathin thicknesses. Here, we demonstrate that few-layer franckeite shows a highly anisotropic nonlinear optical response due to its lattice structure, which allows for the identification of the ripple axis. Moreover, we find that the highly anisotropic third-harmonic emission strongly varies with material thickness. These features are further corroborated by a theoretical nonlinear susceptibility model and the nonlinear transfer matrix method. Overall, our findings help to understand this material and propose a characterization method that could be used in other layered materials and heterostructures to assign their characteristic axes.

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Redox exfoliated NbS₂: characterization, stability, and oxidation

Abstract: Niobium disulfide is a layered transition metal dichalcogenide which has just begun to be exploited as a two-dimensional material. Although it is a superconductor at low-temperatures and demonstrates great potential...

Cited by 2 publications

References 53 publications

Abundant vacancies induced high polarization-attenuation effects in flower-like WS2 microwave absorbers

Abundant vacancies induced high polarization-attenuation effects in flower-like WS2 microwave absorbers

Investigation of the nonlinear optical frequency conversion in ultrathin franckeite heterostructures

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Redox exfoliated NbS2: characterization, stability, and oxidation

Abstract: Niobium disulfide is a layered transition metal dichalcogenide which has just begun to be exploited as a two-dimensional material. Although it is a superconductor at low-temperatures and demonstrates great potential...

Cited by 2 publications

References 53 publications

Abundant vacancies induced high polarization-attenuation effects in flower-like WS2 microwave absorbers

Abundant vacancies induced high polarization-attenuation effects in flower-like WS2 microwave absorbers

Investigation of the nonlinear optical frequency conversion in ultrathin franckeite heterostructures

Contact Info

Product

Resources

About

Redox exfoliated NbS₂: characterization, stability, and oxidation