Program

P.7 -- Poster, NCTP-41

Date: Tuesday, 2 August 2016

Time: 08h30 - 10h00

Effects of external electric fields on transmission and Seebeck coefficients in Bilayer Graphene nanoribbons

Vu Thanh Tra (1), Nguyen Thi Kim Hue (2), Tran Van Nhan (2)

(1) Department of Physics, School of Education, Can Tho University, Can Tho, Vietnam (2) School of Graduate, College of Natural Sciences, Can Tho University, Can Tho, Vietnam

Graphene has shown great applications as the host material for next-generation electronic devices. Previous research demonstrated monolayer Graphene has metallicity, however, Bilayer Graphene exhibits semi-metal characteristics. We have successfully controlled bandgap of AB stacking in Bilayer Graphene by using the external electric fields. Based on the modulation of these electronic structures, calculated by Tight-Binding methods, with field strength is reflected in their electrical properties and Seebeck coefficients. Using Green’s function formalism, we continue to examine the transmission and Seebeck coefficients. Interestingly, we recognize that the transmission and Seebeck coeffients strongly depend on transverse electric fields rather than vertical ones. More importantly, we discriminate the electronic and thermal properties between Armchair and Zigzag Bilayer Graphene nanoribbons. These results may attract new engineering device designs made of Bilayer Graphene nanoribbons. This research is funded by Vietnam National Foundation for Science and Technology Development (NAFOSTED) under grant number 103.01-2015.98

Presenter: Nguyen Thi Kim Hue