# Engineered electronic states in atomically precise artificial lattices and graphene nanoribbons

## TL;DR

This review discusses recent advances in creating atomically precise artificial lattices and graphene nanoribbons with engineered electronic properties, highlighting experimental techniques, topological states, and future prospects.

## Contribution

It provides a comprehensive overview of recent progress in constructing and understanding atomically precise artificial materials and their topological electronic states.

## Key findings

- Progress in atom manipulation and on-surface synthesis techniques
- Observation of topological states in one-dimensional lattices and GNRs
- Potential for designing quantum materials with tailored electronic properties

## Abstract

The fabrication of atomically precise structures with designer electronic properties is one of the emerging topics in condensed matter physics. The required level of structural control can either be reached through atomic manipulation using the tip of a scanning tunneling microscope (STM) or by bottom-up chemical synthesis. In this review, we focus on recent progress in constructing novel, atomically precise artificial materials: artificial lattices built through atom manipulation and graphene nanoribbons (GNRs) realized by on-surface synthesis. We summarize the required theoretical background and the latest experiments on artificial lattices, topological states in one-dimensional lattices, experiments on graphene nanoribbons and graphene nanoribbon heterostructures, and topological states in graphene nanoribbons. Finally, we conclude our review with an outlook to designer quantum materials with engineered electronic structure.