jinzhitong

Nature Electronics, Published online: 22 October 2021; doi:10.1038/s41928-021-00657-y

A monolayer of tungsten oxyselenide, created by oxidizing a layer of tungsten diselenide, can be used to efficiently dope graphene, leading to a room-temperature mobility of 2,000 cm2 V–1 s–1 at a hole density of 3 × 1013 cm–2.

Nature Electronics, Published online: 22 October 2021; doi:10.1038/s41928-021-00668-9

Ion implantation can be used to dope silicon devices, but can be problematic when applied to the atomically thin crystal structure of two-dimensional materials — an increasing range of alternative methods is though available.

Nature Energy, Published online: 01 November 2021; doi:10.1038/s41560-021-00923-5

Organic solar cells processed from green solvents are easier to implement in manufacturing yet their efficiency is low. Chen et al. devise a guest molecule to improve the molecular packing, enabling devices with over 17% efficiency.

Nature Physics, Published online: 25 October 2021; doi:10.1038/s41567-021-01391-0

Most systems exhibiting topological superconductivity are artificial structures that require precise engineering. Now, a layered material shows tantalizing signs of the phenomenon.

Nature Nanotechnology, Published online: 21 October 2021; doi:10.1038/s41565-021-00977-2

Engineering the energy dispersion of polaritons in microcavities can yield intriguing effects such as the anomalous quantum Hall and Rashba effects. Now, different Berry curvature distributions of polariton bands are obtained in a strongly coupled organic–inorganic two-dimensional perovskite single-crystal microcavity and can be modified via temperature and magnetic field variation.

Nature Chemistry, Published online: 18 October 2021; doi:10.1038/s41557-021-00800-4

Layered materials held together by weak interactions can be exfoliated into monolayers that retain the structure and composition of their bulk counterpart, but this has remained challenging to achieve for non-van der Waals materials. Now, AgCrS2 has been exfoliated into such [CrS2]Ag[CrS2] nanosheets through intercalation with tetraalkylammonium cations chosen for their suitable redox potential. The nanosheets show superionic behaviour at room temperature.

Nature, Published online: 20 October 2021; doi:10.1038/s41586-021-04121-x

Evidence for unconventional superconductivity in twisted bilayer graphene