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☐ ☆ ✇ Nature

Observation of hydrodynamic plasmons and energy waves in graphene

By: Wenyu Zhao · Shaoxin Wang · Sudi Chen · Zuocheng Zhang · Kenji Watanabe · Takashi Taniguchi · Alex Zettl · Feng Wang — February 22nd 2023 at 00:00

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.
☐ ☆ ✇ Nature

Evidence for Dirac flat band superconductivity enabled by quantum geometry

By: Haidong Tian · Xueshi Gao · Yuxin Zhang · Shi Che · Tianyi Xu · Patrick Cheung · Kenji Watanabe · Takashi Taniguchi · Mohit Randeria · Fan Zhang · Chun Ning Lau · Marc W. Bockrath — February 15th 2023 at 00:00

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.
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