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Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorus by Top-down Cu Intercalation

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Title
Anisotropic Angstrom-Wide Conductive Channels in Black Phosphorus by Top-down Cu Intercalation
Author(s)
Suk Woo Lee; Lu Qiu; Jong Chan Yoon; Kim, Yohan; Da Li; Oh, Inseon; Lee, Gil-Ho; Yoo, Jung-Woo; Hyung-Joon Shin; Feng Ding; Zonghoon Lee
Subject
SEMICONDUCTORS, ; POINTS
Publication Date
2021-07-28
Journal
NANO LETTERS, v.21, no.14, pp.6336 - 6342
Publisher
American Chemical Society
Abstract
© 2021 American Chemical Society. All rights reserved.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 Å) 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.
URI
https://pr.ibs.re.kr/handle/8788114/10106
DOI
10.1021/acs.nanolett.1c00915
ISSN
1530-6984
Appears in Collections:
Center for Multidimensional Carbon Materials(다차원 탄소재료 연구단) > 1. Journal Papers (저널논문)
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