Reconstructed Fermi surface in graphene on Ir(111) by Gd-Ir surface alloying

I. I. Klimovskikh, M. Krivenkov, A. Varykhalov, D. Estyunin, A. M. Shikin

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

Graphene electronics covers a number of unique effects and the most intriguing ones are based on its interaction with other materials. Contact of graphene with the lattice-mismatched substrate clones the Dirac cone and gives rise to Hofstadter spectrum, while contact with the heavy/magnetic atoms realizes topological insulator phase. Here we study the electronic structure of graphene on Ir(111) with intercalated rare-earth Gd atoms by means of Angle-Resolved Photoemission Spectroscopy (ARPES). Gd intercalation results in the formation of the Gd-Ir surface alloy with the (2 × 2) superstructure, but the moiré superlattice of graphene persists. Strong charge transfer from Gd atoms leads to the shifting of the Dirac cone and its replicas towards the higher binding energies while closing the umklapp band gaps. The replicated Dirac cone bands cross each other near the Fermi level, that is essential for the superlattice effects application in electronics.

Язык оригиналаанглийский
Страницы (с-по)182-186
Число страниц5
ЖурналCarbon
Том147
DOI
СостояниеОпубликовано - 1 июн 2019

Отпечаток

Fermi surface
Graphite
Alloying
Graphene
Cones
Atoms
Electronic equipment
Intercalation
Photoelectron spectroscopy
Fermi level
Binding energy
Rare earths
Electronic structure
Charge transfer
Energy gap
Substrates

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  • Материаловедение (все)

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abstract = "Graphene electronics covers a number of unique effects and the most intriguing ones are based on its interaction with other materials. Contact of graphene with the lattice-mismatched substrate clones the Dirac cone and gives rise to Hofstadter spectrum, while contact with the heavy/magnetic atoms realizes topological insulator phase. Here we study the electronic structure of graphene on Ir(111) with intercalated rare-earth Gd atoms by means of Angle-Resolved Photoemission Spectroscopy (ARPES). Gd intercalation results in the formation of the Gd-Ir surface alloy with the (2 × 2) superstructure, but the moir{\'e} superlattice of graphene persists. Strong charge transfer from Gd atoms leads to the shifting of the Dirac cone and its replicas towards the higher binding energies while closing the umklapp band gaps. The replicated Dirac cone bands cross each other near the Fermi level, that is essential for the superlattice effects application in electronics.",
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Reconstructed Fermi surface in graphene on Ir(111) by Gd-Ir surface alloying. / Klimovskikh, I. I.; Krivenkov, M.; Varykhalov, A.; Estyunin, D.; Shikin, A. M.

В: Carbon, Том 147, 01.06.2019, стр. 182-186.

Результат исследований: Научные публикации в периодических изданияхстатья

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AU - Krivenkov, M.

AU - Varykhalov, A.

AU - Estyunin, D.

AU - Shikin, A. M.

PY - 2019/6/1

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