Twistable electronics with dynamically rotatable heterostructures

Rebeca Ribeiro-Palau (1) , Changjian Zhang , Kenji Watanabe (2) , Takashi Taniguchi (2) , James Hone (3) , Cory R Dean

1 LNE - Laboratoire National de Métrologie et d'Essais [Trappes]
2 NIMS - National Institute for Materials Science
3 Department of Mechanical Engineering

The electronic properties of two-dimensional materials and their heterostructures can be dramatically altered by varying the relative angle between the layers. This makes it theoretically possible to realize a new class of twistable electronics in which device properties can be manipulated on-demand by simply rotating the structure. Here, we demonstrate a new device architecture in which a layered heterostructure can be dynamically twisted, in situ. We study graphene encapsulated by boron nitride where at small rotation angles the device characteristics are dominated by coupling to a large wavelength Moiré superlattice. The ability to investigate arbitrary rotation angle in a single device reveals new features in the optical, mechanical and electronic response in this system. Our results establish the capability to fabricate twistable electronic devices with dynamically tunable properties.

Domaines: Gaz Quantiques [cond-mat.quant-gas]

Rebeca Ribeiro-Palau, Changjian Zhang, Kenji Watanabe, Takashi Taniguchi, James Hone, et al.. Twistable electronics with dynamically rotatable heterostructures. Science, 2019, ⟨10.1126/science.aat6981⟩. ⟨hal-02335522⟩