Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene
Abstract
Silicon-based two-dimensional (2D) materials are uniquely suited for integration in Si-based electronics. Silicene, an analogue of graphene, was recently fabricated on several substrates and was used to make a field-effect transistor. Here, we report that when Ru(0001) is used as a substrate, a range of distinct monolayer silicon structures forms, evolving toward silicene with increasing Si coverage. Low Si coverage produces a herringbone structure, a hitherto undiscovered 2D phase of silicon. With increasing Si coverage, herringbone elbows evolve into silicene-like honeycomb stripes under tension, resulting in a herringbone-honeycomb 2D superlattice. At even higher coverage, the honeycomb stripes widen and merge coherently to form silicene in registry with the substrate. Scanning tunneling microscopy (STM) was used to image the structures. The structural stability and electronic properties of the Si 2D structures, the interaction between the Si 2D structures and the Ru substrate, and the evolution of the distinct monolayer Si structures were elucidated by density functional theory (DFT) calculations. This work paves the way for further investigations of monolayer Si structures, the corresponding growth mechanisms, and possible functionalization by impurities.
- Authors:
-
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Chemistry, Inst. of Physics, Beijing Key Lab. for Nanomaterials and Nanodevices
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics, Beijing Key Lab. for Nanomaterials and Nanodevices; Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy and Dept. of Electrical Engineering and Computer Science
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics, Beijing Key Lab. for Nanomaterials and Nanodevices; Vanderbilt Univ., Nashville, TN (United States). Dept. of Physics and Astronomy and Dept. of Electrical Engineering and Computer Science
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics, Beijing Key Lab. for Nanomaterials and Nanodevices
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Physics, Beijing Key Lab. for Nanomaterials and Nanodevices, School of Physical Sciences and Key Lab. of Vacuum Physics
- Chinese Academy of Sciences (CAS), Beijing (China). Inst. of Chemistry
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Vanderbilt Univ., Nashville, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1484379
- Alternate Identifier(s):
- OSTI ID: 1597815
- Grant/Contract Number:
- FG02-09ER46554; AC02-05CH11231
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nano Letters
- Additional Journal Information:
- Journal Volume: 17; Journal Issue: 2; Journal ID: ISSN 1530-6984
- Publisher:
- American Chemical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Huang, Li, Zhang, Yan-Fang, Zhang, Yu-Yang, Xu, Wenyan, Que, Yande, Li, En, Pan, Jin-Bo, Wang, Ye-Liang, Liu, Yunqi, Du, Shi-Xuan, Pantelides, Sokrates T., and Gao, Hong-Jun. Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene. United States: N. p., 2017.
Web. doi:10.1021/acs.nanolett.6b04804.
Huang, Li, Zhang, Yan-Fang, Zhang, Yu-Yang, Xu, Wenyan, Que, Yande, Li, En, Pan, Jin-Bo, Wang, Ye-Liang, Liu, Yunqi, Du, Shi-Xuan, Pantelides, Sokrates T., & Gao, Hong-Jun. Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene. United States. https://doi.org/10.1021/acs.nanolett.6b04804
Huang, Li, Zhang, Yan-Fang, Zhang, Yu-Yang, Xu, Wenyan, Que, Yande, Li, En, Pan, Jin-Bo, Wang, Ye-Liang, Liu, Yunqi, Du, Shi-Xuan, Pantelides, Sokrates T., and Gao, Hong-Jun. 2017.
"Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene". United States. https://doi.org/10.1021/acs.nanolett.6b04804. https://www.osti.gov/servlets/purl/1484379.
@article{osti_1484379,
title = {Sequence of Silicon Monolayer Structures Grown on a Ru Surface: from a Herringbone Structure to Silicene},
author = {Huang, Li and Zhang, Yan-Fang and Zhang, Yu-Yang and Xu, Wenyan and Que, Yande and Li, En and Pan, Jin-Bo and Wang, Ye-Liang and Liu, Yunqi and Du, Shi-Xuan and Pantelides, Sokrates T. and Gao, Hong-Jun},
abstractNote = {Silicon-based two-dimensional (2D) materials are uniquely suited for integration in Si-based electronics. Silicene, an analogue of graphene, was recently fabricated on several substrates and was used to make a field-effect transistor. Here, we report that when Ru(0001) is used as a substrate, a range of distinct monolayer silicon structures forms, evolving toward silicene with increasing Si coverage. Low Si coverage produces a herringbone structure, a hitherto undiscovered 2D phase of silicon. With increasing Si coverage, herringbone elbows evolve into silicene-like honeycomb stripes under tension, resulting in a herringbone-honeycomb 2D superlattice. At even higher coverage, the honeycomb stripes widen and merge coherently to form silicene in registry with the substrate. Scanning tunneling microscopy (STM) was used to image the structures. The structural stability and electronic properties of the Si 2D structures, the interaction between the Si 2D structures and the Ru substrate, and the evolution of the distinct monolayer Si structures were elucidated by density functional theory (DFT) calculations. This work paves the way for further investigations of monolayer Si structures, the corresponding growth mechanisms, and possible functionalization by impurities.},
doi = {10.1021/acs.nanolett.6b04804},
url = {https://www.osti.gov/biblio/1484379},
journal = {Nano Letters},
issn = {1530-6984},
number = 2,
volume = 17,
place = {United States},
year = {Mon Jan 23 00:00:00 EST 2017},
month = {Mon Jan 23 00:00:00 EST 2017}
}
Web of Science
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