石墨烯
堆积
范德瓦尔斯力
材料科学
凝聚态物理
图层(电子)
物理
纳米技术
量子力学
分子
核磁共振
作者
Loïc Huder,Alexandre Artaud,T. Le Quang,Guy Trambly de Laissardière,A. G. M. Jansen,G. Lapertot,Claude Chapelier,V. Renard
标识
DOI:10.1103/physrevlett.120.156405
摘要
We demonstrate that stacking layered materials allows a 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 structures opening exciting possibilities for straintronics with 2D materials.
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