Evidence of Dirac fermions in multilayer silicene

被引：151

作者：

De Padova, Paola ^{[1
]}

Vogt, Patrick ^{[2
,3
]}

Resta, Andrea ^{[3
]}

Avila, Jose ^{[4
]}

Razado-Colambo, Ivy ^{[3
,4
]}

Quaresima, Claudio ^{[1
]}

Ottaviani, Carlo ^{[1
]}

Olivieri, Bruno ^{[5
]}

Bruhn, Thomas ^{[2
,3
]}

Hirahara, Toru ^{[6
]}

Shirai, Terufusa ^{[6
]}

Hasegawa, Shuji ^{[6
]}

Asensio, Maria Carmen ^{[4
]}

Le Lay, Guy ^{[1
,3
]}

机构：

[1] Consiglio Nazl Ric ISM, I-00133 Rome, Italy

[2] Tech Univ Berlin, Inst Festkorperphys, D-10623 Berlin, Germany

[3] Aix Marseille Univ, CINaM CNRS, F-13288 Marseille 9, France

[4] Synchrotron SOLEIL, F-91192 Gif Sur Yvette, France

[5] Consiglio Nazl Ric ISAC, I-00133 Rome, Italy

[6] Univ Tokyo, Sch Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 16期

关键词：

BILAYER GRAPHENE; GRAPHITE; BANDGAP; GE;

D O I：

10.1063/1.4802782

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Multilayer silicene, the silicon analogue of multilayer graphene, grown on silver (111) surfaces, possesses a honeycomb (root 3 x root 3)R30 degrees reconstruction, observed by scanning tunnelling microscopy at room temperature, past the initial formation of the dominant, 3 x 3 reconstructed, silicene monolayer. For a few layers silicene film we measure by synchrotron radiation photoelectron spectroscopy, a cone-like dispersion at the Brillouin zone centre due to band folding. pi* and pi states meet at similar to 0.25 eV below the Fermi level, providing clear evidence of the presence of gapless Dirac fermions. (C) 2013 AIP Publishing LLC [http://dx.doi.org/10.1063/1.4802782]

引用

页数：3

共 38 条

[1]

[Anonymous], 2012, NATURE, V485, P9

[2] Structural transition of silicene on Ag(111) [J].