Silicene versus two-dimensional ordered silicide: Atomic and electronic structure of Si-$(\sqrt{19}\ifmmode\times\else\texttimes\fi{}\sqrt{19})R23.{4}^{\ensuremath{\circ}}$/Pt(111)

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Silicene versus two-dimensional ordered silicide: Atomic and electronic structure of Si- $(\sqrt{19} \times \sqrt{19}) R 23 . 4^{\circ}$ /Pt(111)

M. Švec, P. Hapala, M. Ondráček, P. Merino, M. Blanco-Rey, P. Mutombo, M. Vondráček, Y. Polyak, V. Cháb, J. A. Martín Gago, and P. Jelínek

Phys. Rev. B 89, 201412(R) – Published 28 May 2014

Abstract

We discuss the possibility of a two-dimensional ordered structure formed upon deposition of Si on metal surfaces. We investigate the atomic and electronic structure of the Si- $(\sqrt{19} \times \sqrt{19}) R 23 . 4^{\circ}$ /Pt(111) surface reconstruction by means of a set of experimental surface-science techniques supported by theoretical calculations. The theory achieves very good agreement with the experimental results and is corroborating beyond any doubt that this phase is a surface alloy consisting of ${Si}_{3}$ Pt tetramers that resembles a twisted kagome lattice. These findings render unlikely any formation of silicene or germanene on Pt(111) and other transition-metal surfaces.

Received 28 February 2014

DOI:https://doi.org/10.1103/PhysRevB.89.201412

Authors & Affiliations

M. Švec^1,*, P. Hapala¹, M. Ondráček¹, P. Merino², M. Blanco-Rey^3,4, P. Mutombo¹, M. Vondráček¹, Y. Polyak¹, V. Cháb¹, J. A. Martín Gago⁵, and P. Jelínek^1,6

¹Institute of Physics AS CR, Cukrovarnická 10, CZ-16200 Prague, Czech Republic
²Centro de Astrobiología INTA-CSIC, Carretera de Ajalvir, km. 4, ES-28850 Madrid, Spain
³Departamento de Física de Materiales UPV/EHU, Apartado 1072, 20018 Donostia-San Sebastián, Spain
⁴Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 Donostia-San Sebastián, Spain
⁵CSIC-ICMM, C/Sor Juana Ines de la Cruz 3, E-28049 Madrid, Spain
⁶Graduate School of Engineering, Osaka University 2-1, Yamada-Oka, Suita, Osaka 565-0871, Japan

^*Corresponding author: svec@fzu.cz

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Vol. 89, Iss. 20 — 15 May 2014

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Physical Review B

covering condensed matter and materials physics

Silicene versus two-dimensional ordered silicide: Atomic and electronic structure of Si- $(\sqrt{19} \times \sqrt{19}) R 23 . 4^{\circ}$ /Pt(111)

M. Švec, P. Hapala, M. Ondráček, P. Merino, M. Blanco-Rey, P. Mutombo, M. Vondráček, Y. Polyak, V. Cháb, J. A. Martín Gago, and P. Jelínek

Phys. Rev. B 89, 201412(R) – Published 28 May 2014

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Physical Review B

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Silicene versus two-dimensional ordered silicide: Atomic and electronic structure of Si-(19×19)R23.4∘/Pt(111)

M. Švec, P. Hapala, M. Ondráček, P. Merino, M. Blanco-Rey, P. Mutombo, M. Vondráček, Y. Polyak, V. Cháb, J. A. Martín Gago, and P. Jelínek

Phys. Rev. B 89, 201412(R) – Published 28 May 2014

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Silicene versus two-dimensional ordered silicide: Atomic and electronic structure of Si- $(\sqrt{19} \times \sqrt{19}) R 23 . 4^{\circ}$ /Pt(111)