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Van Der Waals Epitaxy of Soft Twisted Bilayers: Lattice Relaxation and Static Distortion Waves

preprint
submitted on 26.05.2020 and posted on 28.05.2020 by Cong Jin, Brian Olsen, Erik Luber, Jillian Buriak
Interfaces comprising incommensurate or twisted hexagonal lattices are ubiquitous and of great interest in the materials science and physics communities. Here we demonstrate 2D crystalline domains of soft block copolymers (BCPs) on patterned hard hexagonal lattices that provide fundamental insights into van der Waals heteroepitaxy. At moderate registration forces, it is experimentally found that these BCP-hard lattice incommensurate arrays do not adopt a simple Moiré superstructure, but instead adopt local structural deformations called static distortion waves (SDWs) a primary route to energy minimization.

Funding

Alberta Innovates Technology Futures (CTDP-G2018000919 and AITF iCORE IC50-T1 G2013000198)

NSERC (RGPIN-2014−05195 and RGPIN 2019-04346)

Canada Research Chairs (CRC 207142)

History

Email Address of Submitting Author

jburiak@ualberta.ca

Institution

University of Alberta

Country

Canada

ORCID For Submitting Author

0000-0002-9567-4328

Declaration of Conflict of Interest

None

Version Notes

Version 1 of this paper (first submission)

Exports