Electrically tunable band gap in silicene

By N. Drummond, V. Zólyomi, Vladimir Fal'ko. 2011

941 citations recorded by the source corpus.

We report calculations of the electronic structure of silicene and the stability of its weakly buckled honeycomb lattice in an external electric field oriented perpendicular to the monolayer of Si atoms. The electric field produces a tunable band gap in the Dirac-type electronic spectrum, the gap being suppressed by a factor of about eight by the high polarizability of the system. At low electric fields, the interplay between this tunable band gap, which is specific to electrons on a honeycomb lattice, and the Kane-Mele spin-orbit coupling induces a transition from a topological to a band insulator, whereas at much higher electric fields silicene becomes a semimetal.

Subfields: Atomic and Molecular Physics, and Optics, Materials Chemistry, Organic Chemistry

View Paper: https://www.semanticscholar.org/paper/9f60aee12d13a4d1f02d250041b52a42adca1f42

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In Atomic and Molecular Physics, and Optics

In Materials Chemistry

In Organic Chemistry

Citations in the corpus

Colloquium : Spintronics in graphene and other two-dimensional materials (2019, background): “For the same reason, the band topology can be controlled by applying a perpendicular electric field (Drummond et al., 2012; Ezawa, 2012).”
Application of silicene, germanene and stanene for Na or Li ion storage: A theoretical investigation (2016, background): “constant (α) and the buckling high (Δ) of silicene, germanene and stanene. Lattice constant, α (Å) Buckling high, Δ (Å) Present study Previous reports Present study Previous reports Silicene 3.85 3.86[40], 3.83[41] 0.46 0.45[40],0.44[9],0.44[41] Germanene 4.01 4.045[42], 3.97[41] 0.7 0.68[42], 0.64[”