Band gap and correlated phenomena in bilayer and trilayer graphene

Yongjin Lee; Kevin Myhro; David Tran; Nathaniel Gilgren; Jairo Velasco Jr.; Wenzhong Bao; Michael Deo; Chun Ning Lau

doi:10.1117/12.2016521

29 May 2013 Band gap and correlated phenomena in bilayer and trilayer graphene

Yongjin Lee, Kevin Myhro, David Tran, Nathaniel Gilgren, Jairo Velasco Jr., Wenzhong Bao, Michael Deo, Chun Ning Lau

Proceedings Volume 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V; 872506 (2013) https://doi.org/10.1117/12.2016521
Event: SPIE Defense, Security, and Sensing, 2013, Baltimore, Maryland, United States

Abstract

Graphene and its few layer cousins are unique two-dimensional (2D) systems with extraordinary electrical, thermal, mechanical and optical properties, and they have become both fantastic platforms for exploring fundamental processes and some of the most promising material for next generation electronics. Here we present our transport studies of dual gated suspended bilayer and trilayer graphene devices. At the charge neutrality point, application of an electric field induces a gap in bilayer graphene’s band structure. For high mobility bilayer devices, we observe an intrinsic insulating state with a gap of 2-3 meV and a transition temperature ~5K, which arises from electronic interactions. In ABC-stacked trilayer devices, an insulating state with gap ~25 meV is observed. Our results underscore the rich interaction-induced collective states in few layer graphene and suggest a promising direction for THz technology and high speed low dissipation electronic devices.

Citation Download Citation

Yongjin Lee, Kevin Myhro, David Tran, Nathaniel Gilgren, Jairo Velasco Jr., Wenzhong Bao, Michael Deo, and Chun Ning Lau "Band gap and correlated phenomena in bilayer and trilayer graphene", Proc. SPIE 8725, Micro- and Nanotechnology Sensors, Systems, and Applications V, 872506 (29 May 2013); https://doi.org/10.1117/12.2016521

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