Sodium-Induced Reordering of Atomic Stacks in Black Phosphorus

Yingchun Cheng, Yihan Zhu, Yu Han, Zhongyuan Liu, Bingchao Yang, Anmin Nie, Wei Huang, Reza Shahbazian-Yassar, Farzad Mashayek

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While theoretical simulations predict contradictory results about how the intercalation of foreign metal atoms affects the order of atomic layers in black phosphorus (BP), no direct experimental visualization work has yet clarified this ambiguity. By in situ electrochemical sodiation of BP inside a high-resolution transmission electron microscope and first-principles calculations, we found that sodium intercalation induces a relative glide of/ ⟨010⟩ {001}, resulting in reordering of atomic stacks from AB to AC in BP. The observed local amorphization in our experiments is triggered by lattice constraints. We predict that intercalation of sodium or other metal atoms introduces n-type carriers in BP. This potentially opens a new field for two-dimensional electronics based on BP.
Original languageEnglish (US)
Pages (from-to)1350-1356
Number of pages7
JournalChemistry of Materials
Issue number3
StatePublished - Jan 24 2017

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