Programme

P.24 -- Poster, VCTP-49

Date: Wednesday, 31 July 2024

Time: 08:30 - 10:00

A qualitative investigation of electrical conductivity in three-layer graphene structures

Dang Khanh Linh (1), Le Thi Kieu Oanh (2), Nguyen Nhu Tan Lanh (1), Le Nguyen Hoang Giao (1)

(1) Computational Physics Key Laboratory, Department of Physics, Ho Chi Minh City University of Education, 280 An Duong Vuong Street, Ward 4, District 5, Ho Chi Minh City 72711, Vietnam. (2) Department of Physics - University of Science - VNUHCM, 227-Nguyen Van Cu Street, 5Th District, Ho Chi Minh City, Vietnam

We study the electrical conductivity $\sigma_1, \sigma_2, \sigma_3$ of a three-layer graphene system made of parallel-placed bilayer graphene layers. This investigation consists of three steps: The first step is calculating the effective interactions $W_{11}, W_{22}, W_{33}$ between impurities and electrons by using the multi-component random phase approximation. The second step is defining the dependence of $W_{11}, W_{22}, W_{33}$ on interlayer distance d, dielectric constant $\varepsilon_1, \varepsilon_2, \varepsilon_3, \varepsilon_4$, and temperature $T$. The third step is identifying the proportional relation between $W_{11}, W_{22}, W_{33}$ and $\sigma_1, \sigma_2, \sigma_3$. Based on the obtained results, we deduce the rules of change of $\sigma_1, \sigma_2, \sigma_3$ when $d, \varepsilon_1, \varepsilon_2, \varepsilon_3$, and $T$ vary.

Presenter: Le Thi Kieu Oanh