Effect of Geometrical Structure on Transport Properties of Silicene Nanoconstrictions
Yawen Guo1, Wenqi Jiang1, Xinru Wang1, Fei Wan1, Guanqing Wang1*, G. H. Zhou2, Z. B. Siu3, Mansoor B. A. Jalil3, and Yuan Li1*
1Department of Physics, Hangzhou Dianzi University, Hangzhou 310018, China 2Department of Physics and Key Laboratory for Low-Dimensional Quantum Structures and Manipulation (Ministry of Education), Hunan Normal University, Changsha 410081, China 3Computational Nanoelectronics and Nano-device Laboratory, Electrical and Computer Engineering Department, National University of Singapore, Singapore 117576, Singapore
Abstract：We study electrical modulation of transport properties of silicene nanoconstrictions with different geometrical structures. We investigate the effects of the position and width of the central scattering region on the conductance with increasing Fermi energy. It is found that the conductance significantly depends on the position and the width of the nanoconstriction. Interestingly, the symmetrical structure of the central constriction region can induce a resonance effect and significantly increase the system's conductance. We also propose a novel two-channel structure with an excellent performance on the conductance compared to the one-channel structure with the same total width. Such geometrically-induced conductance modulation of silicene nanostructures can be achieved in practice via current nanofabrication technology.
(Electronic structure of nanoscale materials and related systems)
引用本文:
. [J]. 中国物理快报, 2021, 38(12): 127301-.
Yawen Guo, Wenqi Jiang, Xinru Wang, Fei Wan, Guanqing Wang, G. H. Zhou, Z. B. Siu, Mansoor B. A. Jalil, and Yuan Li. Effect of Geometrical Structure on Transport Properties of Silicene Nanoconstrictions. Chin. Phys. Lett., 2021, 38(12): 127301-.
De Padova P, Quaresima C, Ottaviani C, Sheverdyaeva P M, Moras P, Carbone C, Topwal D, Olivieri B, Kara A, and Oughaddou H 2010 Appl. Phys. Lett.96 261905
2021, Vol. 38 
