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Masfufah, Awi
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Control & Systems Engineering Electrical & Electronics Engineering Energy Materials Science & Nanotechnology Physics

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Kemunculan Kemunculan Rashba Splitting Intrinsik pada Monolayer Janus Si2SbBi: Studi Komputasi Berdasarkan Teori Fungsional Densitas Affandi, Yusuf; Darojat, Yusron; Anshory, Muhammad; Masfufah, Awi
Journal of Energy, Material, and Instrumentation Technology Vol 5 No 1 (2024): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v5i1.239

Abstract

In this paper, we investigate the electronic structure of Janus Si2SbBi monolayer and compare it with the non-polar systems Si2Bi2 and Si2Sb2 monolayer based on Density Functional Theory (DFT) calculation. According to the first-principles calculation, these systems exhibit semiconductor properties with energy gaps are 0.674 eV, 0.28 eV, and 1.13 eV for Janus Si2SbBi, Si2Bi2, and Si2Sb2, respectively. In addition, the intrinsic Rashba splitting is also observed around the Γ Point on conduction band minimum (CBM) in the electronic structure of Si2SbBi monolayer, which is not found in Si2Sb2 and Si2Bi2 monolayer systems. This Rashba splitting phenomenon we analyze by using the perturbation theory based on symmetry group and get the first-order Rashba Parameter α1=1.84 eVÅ , and α1=1.73 eVÅ , for Γ-K and Γ-M direction, respectively. With the strong intrinsic Rashba Splitting, the Janus Si­2SbBi monolayer has excellent potential to be the candidate of semiconductor material for spintronics devices.
Co-Authors Muhammad Anshory Yusron Darojat Yusuf Affandi