Evidence of graphene-like electronic signature in silicene nanoribbons

Applied Physics Letters - Tập 96 Số 26 - 2010
Paola De Padova1, Claudio Quaresima1, C. Ottaviani1, Polina M. Sheverdyaeva2, Paolo Moras3, C. Carbone3, D. Topwal4, Bruno Olivieri5, Abdelkader Kara6, Hamid Oughaddou7, B. Aufray8, G. Le Lay8
1CNR-ISM 1 , via Fosso del Cavaliere, 00133 Roma, Italy
2Sincrotrone Trieste 2 , S. S. Km163.5, I-34012 Basovizza (TS), Italy
3CNR-ISM 3 , Trieste, S. S. Km163.5, I-34012 Basovizza (TS), Italy
4ICTP 4 , Strada Costiera 11, 34151 Trieste, Italy
5CNR-ISAC 5 , via Fosso del Cavaliere, 00133 Roma, Italy
6University of Central Florida 6 Department of Physics, , Orlando, Florida 32816, USA
7CEA 7 DSM/IRAMIS/SPCSI, , Bât. 462, Saclay, 91191 Gif sur Yvette, France
8CINaM-CNRS 8 , Campus de Luminy, Case 913, 13288 Marseille Cedex 9, France

Tóm tắt

We report on the electronic properties of straight, 1.6 nm wide, silicene nanoribbons on Ag(110), arranged in a one-dimensional grating with a pitch of 2 nm, whose high-resolution scanning tunneling microscopy images reveal a honeycomb geometry. Angle-resolved photoemission shows quantum confined electronic states of one-dimensional character. The silicon band dispersion along the direction of the nanoribbons suggests a behavior analogous to the Dirac cones of graphene on different substrates.

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Applied Physics Letters

Tập 96 Số 26

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