Effect of a perpendicular magnetic field on bilayer graphene under dual gating

被引:1
|
作者
Saley, Mouhamadou Hassane [1 ]
El Mouhafid, Abderrahim [1 ]
Jellal, Ahmed [1 ,2 ]
机构
[1] Chouaib Doukkali Univ, Fac Sci, Lab Theoret Phys, POB 20, El Jadida 24000, Morocco
[2] Canadian Quantum Res Ctr, 204-3002 32 Ave, Vernon, BC V1T 2L7, Canada
关键词
AB-bilayer graphene; Dual gates; Magnetic field; Landau levels; Ballistic and diffusive transports; Transmission; Conductivity;
D O I
10.1016/j.physe.2024.116077
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
By studying the impact of a perpendicular magnetic field B on AB-bilayer graphene (AB-BLG) under dual gating, we yield several key findings for the ballistic transport of gate U-infinity. Firstly, we discover that the presence of B leads to a decrease in transmission. At a high value of B, we notice the occurrence of anti-Klein tunneling over a significant area. Secondly, in contrast to the results reported in the literature, where high peaks were found with an increasing in-plane pseudomagnetic field applied to AB-BLG, we find a decrease in conductivity as B increases. However, it is worth noting that in both cases, the number of oscillations decreases compared to the result in the study where no magnetic field was present (B = 0). Thirdly, at the neutrality point, we demonstrate that the conductivity decreases and eventually reaches zero for a high value of B, which contrasts with the result that the conductivity remains unchanged regardless of the value taken by the in-plane field. Finally, we consider the diffusive transport with gate U-infinity = 0.2 gamma(1) and observe two scenarios. The amplitude of conductivity oscillations increases with B for energy E less than U-infinity but decreases in the opposite case E > U-infinity.
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页数:5
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