Academic Journal
Flat Bands in Magic-Angle Vibrating Plates
| العنوان: | Flat Bands in Magic-Angle Vibrating Plates |
|---|---|
| المؤلفون: | Rosendo López, María, Peñaranda, Fernando, Christensen, Johan, San-José, Pablo |
| المساهمون: | Ministerio de Economía y Competitividad (España), European Commission |
| بيانات النشر: | American Physical Society |
| سنة النشر: | 2020 |
| المجموعة: | Universidad Carlos III de Madrid: e-Archivo |
| مصطلحات موضوعية: | Bilayers Films, Graphene, Nanomechanical Devices, Nonlinear Dynamics, Física |
| الوصف: | 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 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. ; 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). ; Publicado |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| تدمد: | 0031-9007 |
| Relation: | 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; Physical Review Letters, (2020), 125(21), 214301, pp. 1-6.; http://hdl.handle.net/10016/31563; https://doi.org/10.1103/PhysRevLett.125.214301; 21, 214301; PHYSICAL REVIEW LETTERS; 125; AR/0000026414 |
| DOI: | 10.1103/PhysRevLett.125.214301 |
| الاتاحة: | http://hdl.handle.net/10016/31563 https://doi.org/10.1103/PhysRevLett.125.214301 |
| Rights: | © 2020 American Physical Society. ; open access |
| رقم الانضمام: | edsbas.6F93C226 |
| قاعدة البيانات: | BASE |
| تدمد: | 00319007 |
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| DOI: | 10.1103/PhysRevLett.125.214301 |