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 Moir\'e 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.
@article{arxiv.1804.02038,
title = {Twistable electronics with dynamically rotatable heterostructures},
author = {Rebeca Ribeiro-Palau and Changjian Zhang and Kenji Watanabe and Takashi Taniguchi and James Hone and Cory R. Dean},
journal= {arXiv preprint arXiv:1804.02038},
year = {2018}
}