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arXiv · 1802.01351

Semimetal behavior of bilayer stanene

I. Evazzade·M. R. Roknabadi·T. Morshedloo·M. Modarresi·Y. Mogulkoc·H. Nematifar
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Abstract

Stanene is a two-dimensional (2D) buckled honeycomb structure which has been studied recently owing to its promising electronic properties for potential electronic and spintronic applications in nanodevices. In this article, we present a first-principles study of electronic properties of fluorinated bilayer stanene. The effect of tensile strain, intrinsic spin-orbit, and van der Waals interactions are considered within the framework of density functional theory. The electronic band structure shows a very small overlap between valence and conduction bands at the {\Gamma} point which is a characteristic of semimetal in fluorinated bilayer stanene. A relatively high value of tensile strain is needed to open an energy band gap in the electronic band structure and the parity analysis reveals that the strained nanostructure is a trivial insulator. According to our results, despite the monolayer fluorinated stanene, the bilayer one is not an appropriate candidate for topological insulator.

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I. Evazzade, M. R. Roknabadi, T. Morshedloo, M. Modarresi, Y. Mogulkoc, H. Nematifar. 2018-02-05. Semimetal behavior of bilayer stanene. https://doi.org/10.1016/j.physe.2017.02.016

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