Chemical vapor deposition of superconducting FeTe1-xSex nanosheets

• Main Authors: Hu, Dianyi, Ye, Chen, Wang, Xiaowei, Zhao, Xiaoxu, Kang, Lixing, Liu, Jiawei, Duan, Ruihuan, Cao, Xun, He, Yanchao, Hu, Junxiong, Li, Shengyao, Zeng, Qingsheng, Deng, Ya, Yin, Peng-Fei, Ariando, Ariando, Huang, Yizhong, Zhang, Hua, Wang, Renshaw Xiao, Liu, Zheng
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2021
• Subjects: Engineering::Materials; Chemical Vapor Deposition; FeTe1-xSex
• Online Access: https://hdl.handle.net/10356/151394
• Institution: Nanyang Technological University

FeTe1-xSe x, a promising layered material used to realize Majorana zero modes, has attracted enormous attention in recent years. Pulsed laser deposition (PLD) and molecular-beam epitaxy (MBE) are the routine growth methods used to prepare FeTe1-xSexthin films. However, both methods require high-vacuum conditions and polished crystalline substrates, which hinder the exploration of the topological superconductivity and related nanodevices of this material. Here we demonstrate the growth of the ultrathin FeTe1-xSex superconductor by a facile, atmospheric pressure chemical vapor deposition (CVD) method. The composition and thickness of the two-dimensional (2D) FeTe1-xSex nanosheets are well controlled by tuning the experimental conditions. The as-prepared FeTe0.8Se0.2 nanosheet exhibits an onset superconducting transition temperature of 12.4 K, proving its high quality. Our work offers an effective strategy for preparing the ultrathin FeTe1-xSex superconductor, which could become a promising platform for further study of the unconventional superconductivity in the FeTe1-xSex system.