Electronic spectrum of twisted graphene layers under heterostrain

Autor:	Huder, L., Artaud, A., Quang, T. Le, de Laissardière, G. Trambly, Jansen, A. G. M., Lapertot, G., Chapelier, C., Renard, V. T.
Rok vydání:	2018
Předmět:	Condensed Matter - Mesoscale and Nanoscale Physics Condensed Matter - Materials Science
Zdroj:	Phys. Rev. Lett. 120, 156405 (2018)
Druh dokumentu:	Working Paper
DOI:	10.1103/PhysRevLett.120.156405
Popis:	We demonstrate that stacking layered materials allows a novel type of strain engineering where each layer is strained independently, which we call heterostrain. We combine detailed structural and spectroscopic measurements with tight-binding calculations to show that small uniaxial heterostrain suppresses Dirac cones and leads to the emergence of flat bands in twisted graphene layers (TGLs). Moreover, we demonstrate that heterostrain reconstructs much more severely the energy spectrum of TGLs than homostrain for which both layers are strained identically ; a result which should apply to virtually all van der Waals structure opening exciting possibilities for straintronics with 2D materials. Comment: Main text + supplementary information
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1803.03505 Zobrazit plný text záznamu View this record from Arxiv