More than twenty 2D carbides, nitrides and carbonitrides of transition metals (MXenes) have been synthesized and studied, and dozens more predicted to exist. Highly electrically conductive MXenes show promise in electrical energy storage, electromagnetic interference shielding, electrocatalysis, plasmonics and other applications.

Hybrid polariton states originating from the strong coupling of photonic and excitonic states hold promise for control of nonlinear light behaviour. Here, the authors fabricate a microcavity containing organic dye and WS₂, featuring hybrid polaritons arising from both Frenkel and Wannier-Mott excitons.

The microscopic picture of how superconductivity is linked to antiferromagnetic order in Fe-based compounds remains elusive. Here, Manna et al. report superconducting correlations which spatially coexist with bi-collinear antiferromagnetic order in a one unit cell thin layer of FeTe grown on Bi₂Te₃.

Processing is crucial to ensure material quality and stability in perovskite solar cells. Here, Pool et al. develop a scalable infrared annealing method and use in situ XRD to map the processing phase space relative to the device efficiency. This provides a tool to determine processing requirements.

Creating and controlling topological states of matter has become a central goal in condensed matter physics. Here, the authors report a predictive Floquet engineering of various topological phases in Na₃Bi by using femtosecond laser pulses.

Cryo-EM structures of full-length human PC2 reveal two distinct channel states: an open conformation and a blocked conformation with Ca²⁺ bound at the entrance of the selectivity filter.