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Nano Research 2020, 13(9): 2378-2383 https://doi.org/10.1007/s12274-020-2858-x
Research Article | Issue | Published: 25 June 2020

The potentially crucial role of quasi-particle interferences for the growth of silicene on graphite

Show Author's Information Fatme Jardali1,  Christoph Lechner1,  Maurizio De Crescenzi2,  Manuela Scarselli2,  Isabelle Berbezier3,  Paola Castrucci2,  Holger Vach1( )
LPICM, CNRS, Ecole Polytechnique, IP Paris, Palaiseau 91128, France
Dipartimento di Fisica, Università di Roma "Tor Vergata", Roma 00133, Italy
CNRS, Aix-Marseille Université, IM2NP, Marseille 13397, France
Keywords:
scanning tunneling microscopy (STM), ab initio calculations, highly oriented pyrolytic graphite (HOPG), silicene growth, quasi-particle interferences, two-dimensional (2D) self-assembly
Topics:
GraphiteQuantum interference devices
Cite this article:
Jardali F, Lechner C, De Crescenzi M, et al. The potentially crucial role of quasi-particle interferences for the growth of silicene on graphite. Nano Research, 2020, 13(9): 2378-2383. https://doi.org/10.1007/s12274-020-2858-x
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Abstract Full text About this article

A comprehensive picture of the initial stages of silicene growth on graphite is drawn. Evidence is shown that quasiparticle interferences play a crucial role in the formation of the observed silicene configurations. We propose, on one hand, that the charge modulations caused by those quantum interferences serve as templates and guide the incoming Si atoms to self-assemble to the unique ( 3×3)R30° honeycomb atomic arrangement. On the other hand, their limited extension limits the growth to about 150 Si atoms under our present deposition conditions. The here proposed electrostatic interaction finally explains the unexpected stability of the observed silicene islands over time and with temperature. Despite the robust guiding nature of those quantum interferences during the early growth phase, we demonstrate that the window of experimental conditions for silicene growth is quite narrow, making it an extremely challenging experimental task. Finally, it is shown that the experimentally observed three-dimensional silicon clusters might very well be the simple result of the end of the silicene growth resulting from the limited extent of the quasi-particle interferences.


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About this article

The potentially crucial role of quasi-particle interferences for the growth of silicene on graphite

Show Author's information Fatme Jardali1, Christoph Lechner1, Maurizio De Crescenzi2, Manuela Scarselli2, Isabelle Berbezier3, Paola Castrucci2, Holger Vach1( )
LPICM, CNRS, Ecole Polytechnique, IP Paris, Palaiseau 91128, France
Dipartimento di Fisica, Università di Roma "Tor Vergata", Roma 00133, Italy
CNRS, Aix-Marseille Université, IM2NP, Marseille 13397, France

Abstract

A comprehensive picture of the initial stages of silicene growth on graphite is drawn. Evidence is shown that quasiparticle interferences play a crucial role in the formation of the observed silicene configurations. We propose, on one hand, that the charge modulations caused by those quantum interferences serve as templates and guide the incoming Si atoms to self-assemble to the unique ( 3×3)R30° honeycomb atomic arrangement. On the other hand, their limited extension limits the growth to about 150 Si atoms under our present deposition conditions. The here proposed electrostatic interaction finally explains the unexpected stability of the observed silicene islands over time and with temperature. Despite the robust guiding nature of those quantum interferences during the early growth phase, we demonstrate that the window of experimental conditions for silicene growth is quite narrow, making it an extremely challenging experimental task. Finally, it is shown that the experimentally observed three-dimensional silicon clusters might very well be the simple result of the end of the silicene growth resulting from the limited extent of the quasi-particle interferences.

Keywords: scanning tunneling microscopy (STM), ab initio calculations, highly oriented pyrolytic graphite (HOPG), silicene growth, quasi-particle interferences, two-dimensional (2D) self-assembly

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Publication history
Copyright
Acknowledgements

Publication history

Received: 18 December 2019
Revised: 30 April 2020
Accepted: 08 May 2020
Published: 25 June 2020
Issue date: September 2020

Copyright

© Tsinghua University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Acknowledgements

We are most thankful to Dr. Andrew Mayne who shared his in-depth understanding of quantum interferences with us in several exciting and encouraging discussions. H. V., F. J., and C. L. gratefully acknowledge the HPC centers of IDRIS (Grant A004-090642) and CERMM for computational resources. F. J. acknowledges the Hariri Foundation for Sustainable Human Development for the scholarship that was awarded to her during her PhD studies. We would like to express our most sincere thanks to Prof. Chih-Piao Chuu for having kindly provided us with the structure files of his most stable silicene configurations. M. D. C., M. S. and P. C. acknowledge the European Community for the HORIZON 2020 MSC-RISE Project DiSeTCom (GA 823728). Many thanks are also due to Dr. James Creel for the careful reading of the present manuscript. We finally would like to acknowledge the fruitful discussions we had with Prof. Sanjay Mathur at the University of Köln.

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