2014/12/03 by Xiaolong Chen, Yingying Wu, Zefei Wu +8 · 2 citations
Materials Science · Physics and Astronomy · #2D Materials and Applications #Graphene research and applications #MXene and MAX Phase Materials #cond-mat.mtrl-sci
paper · pdf · doi:10.1038/ncomms8315
published as Nature Communications 6 : 7315 (2015)
arxiv created 2014/12/03 · arxiv updated 2015/05/25 · openalex publication_date 2015/06/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30
Two-dimensional (2D) materials, such as graphene and transition metal dichalcogenides have attracted great attention because of the rich physics and potential applications in next-generation nano-sized electronic devices. Recently, atomically thin black phosphorus (BP) has become a new member of the 2D materials family with high theoretical mobility and tunable bandgap structure. However, degradation of properties under atmospheric conditions and high-density charge traps in BP have largely limited its mobility (~400 cm2/Vs at room temperature) and thus restricted its future applications. Here, we report the fabrication of stable BN-BP-BN heterostructures by encapsulating atomically thin BP between hexagonal boron nitride (BN) layers to realize ultraclean BN-BP interfaces which allow a record-high field-effect mobility ~1350 cm2/Vs at room temperature and on-off ratios over 105. At low temperatures, the mobility reaches ~2700 cm2/Vs and quantum oscillations in BP 2D hole gas are observed at low magnetic fields. Importantly, the BN-BP-BN heterostructure can effectively avoid the quality degradation of BP in ambient condition.