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Modulation Doping via a Two-Dimensional Atomic Crystalline Acceptor

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Title
Modulation Doping via a Two-Dimensional Atomic Crystalline Acceptor
Author(s)
Yiping Wang; Jesse Balgley; Eli Gerber; Mason Gray; Narendra Kumar; Xiaobo Lu; Jia-Qiang Yan; Arash Fereidouni; Rabindra Basnet; Seok Joon Yun; Dhavala Suri; Hikari Kitadai; Takashi Taniguchi; Kenji Watanabe; Xi Ling; Jagadeesh Moodera; Young Hee Lee; Hugh O. H. Churchill; Jin Hu; Li Yang; Eun-Ah Kim; David G. Mandrus; Erik A. Henriksen; Kenneth S. Burch
Publication Date
2020-12
Journal
Nano Letters, v.20, no.12, pp.8446 - 8452
Publisher
American Chemical Society
Abstract
Two-dimensional nanoelectronics, plasmonics, and emergent phases require clean and local charge control, calling for layered, crystalline acceptors or donors. Our Raman, photovoltage, and electrical conductance measurements combined with ab initio calculations establish the large work function and narrow bands of α-RuCl3 enable modulation doping of exfoliated single and bilayer graphene, chemical vapor deposition grown graphene and WSe2, and molecular beam epitaxy grown EuS. We further demonstrate proof of principle photovoltage devices, control via twist angle, and charge transfer through hexagonal boron nitride. Short-ranged lateral doping (≤65 nm) and high homogeneity are achieved in proximate materials with a single layer of α-RuCl3. This leads to the best-reported monolayer graphene mobilities (4900 cm2/(V s)) at these high hole densities (3 × 1013 cm-2) and yields larger charge transfer to bilayer graphene (6 × 1013 cm-2). © 2020 American Chemical Society.
URI
https://pr.ibs.re.kr/handle/8788114/12252
DOI
10.1021/acs.nanolett.0c03493
ISSN
1530-6984
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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