Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorus by Top-down Cu Intercalation
| Autor: | Yohan Kim, Feng Ding, Suk Woo Lee, Jung-Woo Yoo, Lu Qiu, Zonghoon Lee, Da Li, Gil-Ho Lee, Inseon Oh, Hyung-Joon Shin, Jong Chan Yoon |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Superconductivity
Materials science business.industry Mechanical Engineering Intercalation (chemistry) Electric Conductivity Bioengineering Phosphorus 02 engineering and technology General Chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Semimetal Crystallography Semiconductor Zigzag Anisotropy General Materials Science 0210 nano-technology business Single crystal |
| Zdroj: | Nano letters. 21(14) |
| ISSN: | 1530-6992 |
| Popis: | Intercalation in black phosphorus (BP) can induce and modulate a variety of the properties including superconductivity like other two-dimensional (2D) materials. In this perspective, spatially controlled intercalation has the possibility to incorporate different properties into a single crystal of BP. We demonstrate anisotropic angstrom-wide (∼4.3 A) Cu intercalation in BP, where Cu atoms are intercalated along a zigzag direction of BP because of its inherent anisotropy. With atomic structure, its microstructural effects, arising from the angstrom-wide Cu intercalation, were investigated and extended to relation with macrostructure. As the intercalation mechanism, it was revealed by in situ transmission electron microscopy and theoretical calculation that Cu atoms are intercalated through top-down direction of BP. The Cu intercalation anisotropically induces transition of angstrom-wide electronic channels from semiconductor to semimetal in BP. Our findings throw light on the fundamental relationship between microstructure changes and properties in intercalated BP, and tailoring anisotropic 2D materials at angstrom scale. |
| Databáze: | OpenAIRE |
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