Fully integrated topological electronics

• Published in: Scientific reports Vol. 12; no. 1; p. 13410
• Main Authors: Liu, Yuqi, Cao, Weidong, Chen, Weijian, Wang, Hua, Yang, Lan, Zhang, Xuan
• Format: Journal Article
• Language: English
• Published: London Nature Publishing Group UK 04-08-2022; Nature Publishing Group; Nature Portfolio
• Subjects: 639/166/987; 639/301/119/2792/4128; Acoustics; Computer engineering; Electronics; Humanities and Social Sciences; Integrated circuits; multidisciplinary; Physical properties; Science; Science (multidisciplinary); Symmetry
• ISSN: 2045-2322; 2045-2322
• DOI: 10.1038/s41598-022-17010-8

Topological insulators (TIs) have attracted significant attention in photonics and acoustics due to their unique physical properties and promising applications. Electronics has recently emerged as an exciting arena to study various topological phenomena because of its advantages in building complex topological structures. Here, we explore TIs on an integrated circuit (IC) platform with a standard complementary metal-oxide-semiconductor technology. Based on the Su–Schrieffer–Heeger model, we design a fully integrated topological circuit chain using multiple capacitively-coupled inductor–capacitor resonators. We perform comprehensive post-layout simulations on its physical layout to observe and evaluate the salient topological features. Our results demonstrate the existence of the topological edge state and the remarkable robustness of the edge state against various defects. Our work shows the feasibility and promise of studying TIs with IC technology, paving the way for future explorations of large-scale topological electronics on the scalable IC platform.