Monatomic Sb thin films alloyed with Sb2S3 enables superior thermal stability and resistance drift by spontaneous self-decomposition. Issue 12 (15th June 2023)

• Record Type: Journal Article
• Authors: Zhu, Jinyi; Wang, Guoxiang; Jiao, Yucheng; Wu, Tong; Lotnyk, Andriy
• Is Part Of: Ceramics international. Volume 49:Issue 12(2023)
• Page Start: 19960
• Page End: 19965
• Publication Date: 2023-06-15
• Subjects: Binary material -- Resistance drift -- Thermal properties; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2023.03.117
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Monatomic Sb thin films can eliminate the risks of compositional partitioning, but it normally crystallizes instantly and fails to maintain amorphous state at room temperature. Here, we prepared Sbx (Sb2 S3 )100-x thin films. The materials consist of pure Sb with low resistance drift and chalcogenide Sb2 S3 with high thermal stability. It is found that the Sb64·8 (Sb2 S3 )35.2 thin film possesses the advantages of these two compounds. The thin film showed good phase-change ability with an ultralow resistance drift coefficient of 0.006, much lower than conventional Ge2 Sb2 Te5 (0.076). Moreover, it also exhibited a better amorphous thermal stability. These improvements are closely related to the hybrid nanostructure of Sb crystals and Sb–S phase by spontaneous self-decomposition in the Sb-rich Sb–S material. Our work thus demonstrates that the binary Sb-rich Sb–S thin film can become a promising alternative to replace the conventional Ge2 Sb2 Te5 thin film with potential for neuromorphic synaptic devices.