论文标题

扭曲多层石墨烯超晶格的电子结构计算

Electronic structure calculations of twisted multi-layer graphene superlattices

论文作者

Tritsaris, Georgios A., Carr, Stephen, Zhu, Ziyan, Xie, Yiqi, Torrisi, Steven B., Tang, Jing, Mattheakis, Marios, Larson, Daniel, Kaxiras, Efthimios

论文摘要

量子限制赋予其二维(2D)分层材料,具有特殊的物理和新型特性,与它们的散装物质相比。尽管已经实现和研究了石墨烯的某些两层和几层构型,但仍缺乏对任意分层石墨烯组件的特性的系统研究。我们介绍了理论概念和方法来处理材料信息的处理,并在案例研究中使用它们以高通量方式研究基于多层石墨烯的组件的电子结构。我们对紧密结合带结构中的模式和趋势进行了批判性讨论,并使用低分散电子条带确定了特定的分层组件,作为潜在有趣物理的指标,例如强相关行为。用于可视化和预测的数据驱动模型的组合用于智能探索材料空间。这项工作通常旨在增加对基于物理和数据驱动的建模的联合使用的信心,以系统地完善有关2D层次材料的知识,这对新型量子设备的开发产生了影响。

Quantum confinement endows two-dimensional (2D) layered materials with exceptional physics and novel properties compared to their bulk counterparts. Although certain two- and few-layer configurations of graphene have been realized and studied, a systematic investigation of the properties of arbitrarily layered graphene assemblies is still lacking. We introduce theoretical concepts and methods for the processing of materials information, and as a case study, apply them to investigate the electronic structure of multi-layer graphene-based assemblies in a high-throughput fashion. We provide a critical discussion of patterns and trends in tight binding band structures and we identify specific layered assemblies using low-dispersion electronic bands as indicators of potentially interesting physics like strongly correlated behavior. A combination of data-driven models for visualization and prediction is used to intelligently explore the materials space. This work more generally aims to increase confidence in the combined use of physics-based and data-driven modeling for the systematic refinement of knowledge about 2D layered materials, with implications for the development of novel quantum devices.

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