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Nano-Scale Strain-Induced Giant Pseudo-Magnetic Fields and Charging Effects in CVD-Grown Graphene on Copper

Yeh, Nai-Chang and Teague, Marcus L. and Wu, Renee T. and Yeom, Sinchul and Standley, Brian and Boyd, David and Bockrath, Marc W. (2011) Nano-Scale Strain-Induced Giant Pseudo-Magnetic Fields and Charging Effects in CVD-Grown Graphene on Copper. ECS Transactions, 35 (3). pp. 161-172. ISSN 1938-5862.

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Scanning tunneling microscopic and spectroscopic (STM/STS) studies of graphene grown by chemical vapor deposition (CVD) on copper reveal that the monolayer carbon structures remaining on copper are strongly strained and rippled, with different regions exhibiting different lattice structures and local electronic density of states (LDOS). The large and non-uniform strain induces pseudo-magnetic field up to ∼ 50 Tesla, as manifested by the integer and fractional pseudo-magnetic field quantum Hall effects (IQHE and FQHE) in the LDOS of graphene. Additionally, ridges appear along the boundaries of different lattice structures, which exhibit excess charging effects. For graphene transferred from copper to SiO_2 substrates after the CVD growth, the average strain and the corresponding charging effects and pseudo-magnetic fields become much reduced. These findings suggest the feasibility of strain-engineering of graphene-based nano-electronics.

Item Type:Article
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Yeh, Nai-Chang0000-0002-1826-419X
Yeom, Sinchul0000-0001-6449-0844
Additional Information:© 2011 The Electrochemical Society. The work at Caltech was jointly supported by the National Science Foundation and the Nano Research Initiatives (NRI) under the Center of Science and Engineering of Materials (CSEM).
Group:Kavli Nanoscience Institute
Funding AgencyGrant Number
Issue or Number:3
Record Number:CaltechAUTHORS:20121126-110607908
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:35636
Deposited By: Tony Diaz
Deposited On:26 Nov 2012 22:40
Last Modified:09 Mar 2020 13:19

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