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Electrically tunable band gap in silicene

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Electrically tunable band gap in silicene. / Drummond, Neil; Zolyomi, Viktor; Falko, Vladimir.

In: Physical review B, Vol. 85, No. 7, 075423, 22.02.2012.

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@article{35d96f1703984fbfb1c790cfc5827fe2,
title = "Electrically tunable band gap in silicene",
abstract = "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.",
author = "Neil Drummond and Viktor Zolyomi and Vladimir Falko",
note = "{\textcopyright}2012 American Physical Society",
year = "2012",
month = feb,
day = "22",
doi = "10.1103/PhysRevB.85.075423",
language = "English",
volume = "85",
journal = "Physical Review B: Condensed Matter and Materials Physics",
issn = "1098-0121",
publisher = "AMER PHYSICAL SOC",
number = "7",

}

RIS

TY - JOUR

T1 - Electrically tunable band gap in silicene

AU - Drummond, Neil

AU - Zolyomi, Viktor

AU - Falko, Vladimir

N1 - ©2012 American Physical Society

PY - 2012/2/22

Y1 - 2012/2/22

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=84857702775&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.85.075423

DO - 10.1103/PhysRevB.85.075423

M3 - Journal article

AN - SCOPUS:84857702775

VL - 85

JO - Physical Review B: Condensed Matter and Materials Physics

JF - Physical Review B: Condensed Matter and Materials Physics

SN - 1098-0121

IS - 7

M1 - 075423

ER -