Twistable electronics with dynamically rotatable heterostructures

TL;DR

This paper introduces a novel device architecture enabling in situ dynamic twisting of layered heterostructures, allowing real-time tuning of electronic, optical, and mechanical properties in two-dimensional materials.

Contribution

It demonstrates the first dynamically rotatable heterostructure device, enabling on-demand manipulation of properties by in situ rotation, advancing twistable electronics technology.

Findings

Device characteristics are dominated by Moiré superlattice at small angles.

Arbitrary rotation angles reveal new optical, mechanical, and electronic features.

The device enables real-time, tunable control of 2D material properties.

Abstract

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.