Observation of hydrodynamic plasmons and energy waves in graphene

Nature, Published online: 22 February 2023; doi:10.1038/s41586-022-05619-8

By using new on-chip terahertz spectroscopy techniques to measure the absorption spectra of a graphene microribbon as well as the energy waves close to charge neutrality, hydrodynamic collective excitations are observed.

Evidence for Dirac flat band superconductivity enabled by quantum geometry

Nature, Published online: 15 February 2023; doi:10.1038/s41586-022-05576-2

The authors investigate the effect of small velocity in a superconducting Dirac flat band system, finding evidence for small pairs and that superfluid stiffness is not dominated by kinetic energy.