Engineering Interlayer Electron–Phonon Coupling in WS2/BN Heterostructures

• DOI: 10.1021/acs.nanolett.1c04598
• Publication Date: 2022-03-16T12:55:14Z
• Authors: Yifei Li; Xiaowei Zhang; Jinhuan Wang; Xiaoli Ma; Jin-An Shi; Xiangdong Guo; Yonggang Zuo; Ruijie Li; Hao Hong; Ning Li; Kai Xu; Xinyu Huang; Huifeng Tian; Ying Yang; Zhixin Yao; PeiChi Liao; Xiao Li; Junjie Guo; Yuang Huang; Peng Gao; Lifen Wang; Xiaoxia Yang; Qing Dai; EnGe Wang; Kaihui Liu; Wu Zhou; Xiaohui Yu; Liangbo Liang; Ying Jiang; Xin-Zheng Li; Lei Liu
• Keywords: Brillouin zone

In van der Waals (vdW) heterostructures, the interlayer electron-phonon coupling (EPC) provides one unique channel to nonlocally engineer these elementary particles. However, limited by stringent occurrence conditions, efficient engineering of EPC remains elusive. Here we report a multitier in WS2/boron nitride (BN) including isotope enrichments BN substrates, temperature, and high-pressure tuning. The hyperfine dependence Raman intensities was unambiguously revealed. combination with theoretical calculations, anticipate that WS2/BN supercells could induce Brillouin-zone-folded phonons contribute coupling, leading complex nature broad peaks. We further demonstrate significance previously unexplored parameter, spacing. By varying temperature high pressure, effectively manipulated strengths on/off capabilities, indicating critical thresholds layer-layer spacing for activating strengthening EPC. Our findings provide new opportunities vdW heterostructures controlled coupling.