Engineering Macroscopic Uniform 2D Moiré-Matter

Designing moiré matter interfaces provides an unprecedented and diverse platform for engineering exotic properties for quantum information science and technology. To date, however, current preeminent manufacturing methods of moiré matter have been laborious, yielding micrometer sample size, and fraught with crucial challenges such as low production efficiency and reproducibility, twist angle disorder, and interfacial contaminations. In this work, I introduce a rapid <i>in situ </i>exfoliation and stacking manufacturing technique for engineering moiré interfaces of twisted monolayer on bulk vdW systems with unprecedented scale and exceptional uniformity. Benefiting from the inherent lattice alignment of exfoliated monolayers within their original vdW layered crystal, the desired twist angle in homo twisted moiré structures can be meticulously controlled, either manually or through automated robotic processes. As a result, this technique offers distinct control over the twist angle compared to traditional methods. We directly characterize real space moiré and reciprocal space back-folded lattice, as well as moiré mini band structures, using piezoresponse force microscopy and torsional force microscopy (PFM/TFM), low energy electron diffraction (LEED) and angle-resolved photoemission spectroscopy (ARPES), respectively. This technique enables effective batch assembly of highly customizable moiré interfaces, providing a platform for exploring hitherto inaccessible quantum phenomena with macroscopic advanced characterization techniques.