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Adsorption of Na Monolayer on Graphene Covered Pt(111) Substrate

Gogina, A. A. (author)
Tarasov, A. V. (author)
Eryzhenkov, A. V. (author)
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Rybkin, A. G. (author)
Shikin, A. M. (author)
Filianina, Mariia (author)
Stockholms universitet,Fysikum
Klimovskikh, I. I. (author)
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 (creator_code:org_t)
2023
2023
English.
In: JETP Letters. - 0021-3640 .- 1090-6487. ; 117:2, s. 138-146
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Modification of graphene electronic properties via contact with atoms of different kind allows for designing a number of functional post-silicon electronic devices. Specifically, 2D metallic layer formation over graphene is a promising approach to improving the electronic properties of graphene-based systems. In this work we analyse the electronic and spin structure of graphene synthesized on Pt(111) after sodium monolayer adsorption by means of angle-resolved photoemission spectroscopy and ab initio calculations. Here, we show that sodium layer formation leads to a shift of the graphene pi states towards higher binding energies, but the most intriguing property of the studied system is the appearance of a partially spin-polarized Kanji symbol-like feature resembling the graphene Dirac cone in the electronic structure of adsorbed sodium. Our findings reveal that this structure is caused by a strong interaction between Na orbitals and Pt 5d spin-polarized states, where the graphene monolayer between them serves as a mediator of such interaction.

Subject headings

NATURVETENSKAP  -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Condensed Matter Physics (hsv//eng)

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