xmlui.dri2xhtml.METS-1.0.item-contributor-funder:
Ministerio de Economía y Competitividad (España) European Commission
Sponsor:
F. P. and P. S.-J. acknowledge support from the Spanish Ministry of Science, Innovation and Universities through Grants No. PCI2018-093026 and No. PGC2018-097018-B-I00 (AEI/FEDER, EU). J. C. acknowledges the support from the European Research Council (ERC) through the Starting Grant No. 714577 PHONOMETA and from the
MINECO through a Ramón y Cajal grant (Grant No. RYC2015-17156).
Project:
Gobierno de España. PCI2018-093026 Gobierno de España. PGC2018-097018-B-I00 Gobierno de España. RYC-2015-17156 info:eu-repo/grantAgreement/EC/H2020/714577/PHONOMETA
Twisted bilayer graphene develops quasiflat bands at specific "magic" interlayer rotation angles through an unconventional mechanism connected to carrier chirality. Quasiflat bands are responsible for a wealth of exotic, correlated-electron phases in the systeTwisted bilayer graphene develops quasiflat bands at specific "magic" interlayer rotation angles through an unconventional mechanism connected to carrier chirality. Quasiflat bands are responsible for a wealth of exotic, correlated-electron phases in the system. In this Letter, we propose a mechanical analog of twisted bilayer graphene made of two vibrating plates patterned with a honeycomb mesh of masses and coupled across a continuum elastic medium. We show that flexural waves in the device exhibit vanishing group velocity and quasiflat bands at magic angles in close correspondence with electrons in graphene models. The strong similarities of spectral structure and spatial eigenmodes in the two systems demonstrate the chiral nature of the mechanical flat bands. We derive analytical expressions that quantitatively connect the mechanical and electronic models, which allow us to predict the parameters required for an experimental realization of our proposal.[+][-]