{"id":8210,"date":"2020-12-07T14:47:22","date_gmt":"2020-12-07T14:47:22","guid":{"rendered":"https:\/\/www.innovationnewsnetwork.com\/?p=8210"},"modified":"2020-12-07T14:47:22","modified_gmt":"2020-12-07T14:47:22","slug":"scientists-use-twistronics-to-create-a-nanomaterial-called-van-der-waals-heterostructures","status":"publish","type":"post","link":"https:\/\/www.innovationnewsnetwork.com\/scientists-use-twistronics-to-create-a-nanomaterial-called-van-der-waals-heterostructures\/8210\/","title":{"rendered":"Scientists use twistronics to create a nanomaterial called van der Waals heterostructures"},"content":{"rendered":"
The team of international researchers has revealed a novel method that could fine tune the angled \u2018twist\u2019 between atom-thin layers that form van der Waals heterostructures, and help accelerate the next generation of electronics. The new technique can achieve in situ<\/em> dynamical rotation and manipulation of 2D materials<\/a> layered on top of each other to form the nanoscale devices that possess unusual properties and exciting new phenomena.<\/p>\n Yaping Yang, the lead author of this work, said: \u201cOur technique enables twisted van der Waals heterostructures with dynamically tuneable optical, mechanical, and electronic properties. This technique, for example, could be used in autonomous robotic manipulation of two-dimensional crystals to build van der Waals superlattices, which would allow accurate positioning, rotation, and manipulation of 2D materials to fabricate materials with desired twist angles, to fine-tune electronic and quantum properties of van der Waals materials.\u201d<\/p>\n Twisting layers of 2D crystals can form a moir\u00e9 pattern, where lattices of the parent 2D crystals form a superlattice. This superlattice can completely change the behaviour of electrons in the system, leading to many novel phenomena, including strong electron correlations, fractal quantum Hall effect, and superconductivity.<\/p>\n The team demonstrated this technique by successfully fabricating heterostructures where graphene is perfectly aligned with both top and bottom encapsulating layers of hexagonal boron nitride, also known as white graphene, creating double moir\u00e9 superlattices at the two interfaces.<\/p>\n