| AVS 60th International Symposium and Exhibition | |
| Graphene and Other 2D Materials Focus Topic | Thursday Sessions |
| Session GR+EM+NS+SS+TF-ThA |
| Session: | Beyond Graphene: Other 2D Electronic Materials and their Heterostructures |
| Presenter: | G. Le Lay, Aix-Marseille University, France |
| Authors: | G. Le Lay, Aix-Marseille University, France A. Resta, Aix-Marseille University, France |
| Correspondent: | Click to Email |
Born in 2012 on a silver plate [1], artificially created by epitaxy on silver (111) substrates since it does not exist in nature, silicene, graphene's silicon cousin, offers many exciting promises. This is due, typically, to its Dirac fermions with trigonal or hexagonal wrapping and very high Fermi velocity, its two-dimensional topological insulator character, a hint for high-temperature superconductivity, and, last but not least, its direct compatibility with current silicon-based electronics.
However, the significant task to isolate free-standing silicene sheets has not yet been achieved. We will present a first step in this endeavor, since we have succeeded in growing silicene multi-layer stacks, which host massless Dirac Fermions, as demonstrated by the cone-like dispersion in Angle-Resolved PhotoElectron Spectroscopy measurements [2]. We could further characterize this novel silicon allotrope by comparing simultaneously acquired nc-AFM and STM observations in conjunction with transport measurements revealing sheet resistance.
In my talk, I will present these last results and draw perspectives for future research and potential applications.
*guy.lelay@univ-provence.fr
[1] “Silicene: Compelling Experimental Evidence for Graphenelike Two-Dimensional Silicon” P. Vogt, P. De Padova, C. Quaresima, J. Avila, E. Frantzeskakis, M. C. Asensio, A. Resta, B. Ealet and G. Le Lay, Phys. Rev. Lett., 108, 155501 (2012).
[2] “Evidence of Dirac fermions in multilayer silicene” P. De Padova, P. Vogt, A. Resta, J. Avila, I. Razado-Colambo, C. Quaresima, C. Ottaviani, B. Olivieri, T. Bruhn, T. Hirahara, T. Shirai, S. Hasegawa, M. C. Asensio and G. Le Lay, Appl. Phys. Lett., 102, 163106 (2013).
[3] “Sheet resistance of multilayer silicene” P. Capiod, M. Berthe, A. Resta, P. De Padova, T. Bruhn, P. Vogt, G. Le Lay and B. Grandidier, submitted.