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  Absence of Dirac cones in monolayer silicene and multilayer Si films on Ag(111)

Mahatha, S., Moras, P., Sheverdyaeva, P., Bellini, V., Menteş, T., Locatelli, A., et al. (2016). Absence of Dirac cones in monolayer silicene and multilayer Si films on Ag(111). Journal of Electron Spectroscopy and Related Phenomena. doi:10.1016/j.elspec.2016.09.005.

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Mahatha, S.K.1, Author
Moras, P.1, Author
Sheverdyaeva, P.M.1, Author
Bellini, V.2, Author
Menteş, T.O.3, Author
Locatelli, A.3, Author
Flammini, R.4, Author
Horn, Karsten5, Author           
Carbone, C.1, Author
Affiliations:
1Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, I-34149 Trieste, Italy, ou_persistent22              
2Istituto di Nanoscienze, Consiglio Nazionale delle Ricerche, I-41125 Modena, Italy, ou_persistent22              
3Elettra-Sincrotrone Trieste S.C.p.A, SS 14, Km 163,5, I-34149 Trieste, Italy, ou_persistent22              
4Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, I-00133 Roma, Italy, ou_persistent22              
5Physical Chemistry, Fritz Haber Institute, Max Planck Society, ou_634546              

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 Abstract: Monolayer silicene and multilayer silicon films on Ag(111) have been the subject of many investigations within the last few years. For both systems, photoemission data have been interpreted in terms of linearly dispersing bands giving rise to the characteristic Dirac cone features, similar to graphene. Here we demonstrate, on the basis of angle-resolved valence band and core level photoemission data that this assignment is not correct. The bands previously attributed to states with Dirac fermion character are shown to derive from Ag(111) interface and bulk states in the silicene monolayer and from the well-known Ag-View the MathML source(3×3)R30°-Si(111) structure in Si multilayers. These results question the validity of the claim that graphene-like silicene and silicene multilayers are in fact formed on Ag(111).

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 Dates: 2016-09-212016-07-192016-09-212016-09-22
 Publication Status: Published online
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.elspec.2016.09.005
 Degree: -

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Title: Journal of Electron Spectroscopy and Related Phenomena
  Abbreviation : J. Electron Spectrosc. Relat. Phenom.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier B.V.
Pages: 7 Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISSN: 0368-2048
CoNE: https://pure.mpg.de/cone/journals/resource/954925524767