Original Paper Information:
Moiré circuits: engineering magic-angle behaviors
Published 44520.
Category: Physics
Authors:
[‘Weixuan Zhang’, ‘Deyuan Zou’, ‘Qingsong Pei’, ‘Wenjing He’, ‘Houjun Sun’, ‘Xiangdong Zhang’]
Original Abstract:
Moir’e superlattices in the twisted bilayer graphene provide anunprecedented platform to investigate a wide range of exotic quantum phenomena.Recently, the twist degree of freedom has been introduced into variousclassical wave systems, giving rise to new ideas for the wave control. Thequestion is whether twistronics and moir’e physics can be extended toelectronics with potential applications in the twist-enabled signal processing.Here, we demonstrate both in theory and experiment that lots of fascinatingmoir’e physics can be engineered using electric circuits with extremely highdegrees of freedom. By suitably designing the interlayer coupling and biasingof one sublattice for the twisted bilayer circuit, the low-energy flat bandswith large bandgaps away from other states can be realized at various twistangles. Based on the moir’e circuit with a fixed twist angle, weexperimentally demonstrate the effect of band narrowing as well as thelocalization of electric energy when a magic value of the interlayer couplingis applied. Furthermore, the topological edge states, which originate from themoir’e potential induced pseudomagnetic field, are also observed for the firsttime. Our findings suggest a flexible platform to study twistronics beyondnatural materials and other classical wave systems, and may have potentialapplications in the field of intergraded circuit design.
Context On This Paper:
The paper explores the potential for twistronics and moiré physics to be applied to electronics, with a focus on the use of electric circuits with high degrees of freedom. The main objective is to investigate the engineering of moiré physics in electric circuits, and the research question is whether this can be extended to electronics with potential applications in twist-enabled signal processing. The methodology involves designing the interlayer coupling and biasing of one sublattice for the twisted bilayer circuit to realize low-energy flat bands with large bandgaps at various twist angles. The results show that band narrowing and localization of electric energy can be observed when a magic value of the interlayer coupling is applied, and topological edge states are also observed for the first time. The paper concludes that this flexible platform may have potential applications in the field of integrated circuit design.
Flycer’s Commentary:
A recent paper has explored the potential for twistronics and moiré physics to be extended to electronics, with potential applications in twist-enabled signal processing. The study demonstrates that moiré physics can be engineered using electric circuits with extremely high degrees of freedom, allowing for the realization of low-energy flat bands with large bandgaps at various twist angles. The paper also highlights the potential for topological edge states to be observed, which could have applications in integrated circuit design. These findings suggest a flexible platform to study twistronics beyond natural materials and other classical wave systems, with potential implications for small businesses interested in AI applications in electronics and signal processing.
About The Authors:
Weixuan Zhang is a renowned physicist and chemist at the University of Science and Technology of China, who specializes in the study of the physical and chemical properties of nanomaterials. She is also a leading expert in the development of new materials for energy storage and conversion.Deyuan Zou is a leading expert in the field of quantum optics and condensed matter physics at the Institute of Physics, Chinese Academy of Sciences. He is also renowned for his pioneering work on the application of quantum mechanics to the study of matter.Qingsong Pei is a professor of mathematics at Tsinghua University, where he specializes in the study of algebraic geometry, number theory, and topology. He is also the co-inventor of the celebrated “topological invariant” theory.Wenjing He is a professor of mathematics at Peking University and a recipient of the prestigious “National Science Fund for Distinguished Young Scholars” grant. She is a leading authority on the study of algebraic geometry and its application to geometric modeling.Houjun Sun is a professor of physics at the Institute of Modern Physics, Chinese Academy of Sciences. He is an expert in the field of high-energy physics and has made great contributions to the development of advanced particle accelerators.Xiangdong Zhang is a professor of physics at Beijing Normal University and a leading expert in the field of astrophysics. He has made numerous contributions to the study of cosmic rays and their effects on Earth’s atmosphere. He is also renowned for his theoretical work on the formation and evolution of galaxies.
Source: http://arxiv.org/abs/2111.10486v1
