%0 Journal Article %J J. Chem. Inf. Model. %D 2020 %T LAN -- A materials notation for 2D layered assemblies %A Tritsaris, Georgios A. %A Xie, Yiqi %A Alexander M. Rush %A Carr, Stephen %A Marios Mattheakis %A Efthimios Kaxiras %X Two-dimensional (2D) layered materials offer intriguing possibilities for novel physics and applications. Before any attempt at exploring the materials space in a systematic fashion, or combining insights from theory, computation and experiment, a formal description of information about an assembly of arbitrary composition is required. Here, we introduce a domain-generic notation that is used to describe the space of 2D layered materials from monolayers to twisted assemblies of arbitrary composition, existent or not-yet-fabricated. The notation corresponds to a theoretical materials concept of stepwise assembly of layered structures using a sequence of rotation, vertical stacking, and other operations on individual 2D layers. Its scope is demonstrated with a number of example structures using common single-layer materials as building blocks. This work overall aims to contribute to the systematic codification, capture and transfer of materials knowledge in the area of 2D layered materials. %B J. Chem. Inf. Model. %G eng %U https://pubs.acs.org/doi/10.1021/acs.jcim.0c00630