Tunable and sizable band gap in silicene by surface adsorption.
Tunable and sizable band gap in silicene by surface adsorption.
复制标题
通过表面吸附实现硅烯中可调节且相当大的带隙
DOI:
10.1038/srep00853
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发表时间:
2012
影响因子:
4.6
通讯作者:
Lu J
中科院分区:
文献类型:
--
作者:
Quhe R;Fei R;Liu Q;Zheng J;Li H;Xu C;Ni Z;Wang Y;Yu D;Gao Z;Lu J
Opening a sizable band gap without degrading its high carrier mobility is as vital for silicene as for graphene to its application as a high-performance field effect transistor (FET). Our density functional theory calculations predict that a band gap is opened in silicene by single-side adsorption of alkali atom as a result of sublattice or bond symmetry breaking. The band gap size is controllable by changing the adsorption coverage, with an impressive maximum band gap up to 0.50 eV. Theabinitio quantum transport simulation of a bottom-gated FET based on a sodium-covered silicene reveals a transport gap, which is consistent with the band gap and the resulting on/off current ratio is up to 108. Therefore, a way is paved for silicene as the channel of a high-performance FET.
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影响因子:
8.6
作者:
Cahangirov, S.;Topsakal, M.;Ciraci, S.
通讯作者:
Ciraci, S.
影响因子:
3.7
作者:
Brandbyge, M;Mozos, JL;Stokbro, K
通讯作者:
Stokbro, K
影响因子:
8.6
作者:
Castro, Eduardo V.;Novoselov, K. S.;Castro Neto, A. H.
通讯作者:
Castro Neto, A. H.
影响因子:
3.7
作者:
MONKHORST, HJ;PACK, JD
通讯作者:
PACK, JD
影响因子:
3.7
作者:
CLOTET, A;RICART, JM;ILLAS, F
通讯作者:
ILLAS, F