凝聚态物理
超导电性
电荷密度波
超晶格
物理
电荷(物理)
材料科学
量子力学
作者
Zejun Li,Pin Lyu,Zhaolong Chen,Dandan Guan,Yu Sheng,Jinpei Zhao,Pengru Huang,Zhou Xiao-Hong,Zhizhan Qiu,Hanyan Fang,M. Hashimoto,D. H. Lu,Fei Song,Kian Ping Loh,Yi Zheng,Zhi‐Xun Shen,Kostya S. Novoselov,Jiong Lu
标识
DOI:10.1002/adma.202312341
摘要
Abstract Noncentrosymmetric transition metal dichalcogenide (TMD) monolayers offer a fertile platform for exploring unconventional Ising superconductivity (SC) and charge density waves (CDWs). However, the vulnerability of isolated monolayers to structural disorder and environmental oxidation often degrade their electronic coherence. Herein, we report an alternative approach for fabricating stable and intrinsic monolayers of 1H‐TaS 2 sandwiched between SnS blocks in a (SnS) 1.15 TaS 2 van der Waals (vdW) superlattice. The SnS block layers not only decouple individual 1H‐TaS 2 sublayers to endow them with monolayer‐like electronic characteristics, but also protect the 1H‐TaS 2 layers from electronic degradation. The results reveal the characteristic 3 × 3 CDW order in 1H‐TaS 2 sublayers associated with electronic rearrangement in the low‐lying S p band, which uncovers a previously undiscovered CDW mechanism rather than the conventional Fermi surface‐related framework. Additionally, the (SnS) 1.15 TaS 2 superlattice exhibits a strongly enhanced Ising‐like SC with a layer‐independent T c of approximately 3.0 K, comparable to that of the isolated monolayer 1H‐TaS 2 sample, presumably attributed to their monolayer‐like characteristics and retained Fermi states. Our results provide new insights into the long‐debated CDW order and enhanced SC of monolayer 1H‐TaS 2 , establishing bulk vdW superlattices as promising platforms for investigating exotic collective quantum phases in the two‐dimensional limit. This article is protected by copyright. All rights reserved
科研通智能强力驱动
Strongly Powered by AbleSci AI