Intercalation of Iron Atoms under Graphene Formed on Silicon Carbide


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The intercalation of iron under a graphene monolayer grown on 4H-SiC(0001) is studied. The experiments have been carried out in situ under conditions of ultrahigh vacuum by low-energy electron diffraction, high-energy-resolution photoelectron spectroscopy using synchrotron radiation, and near carbon K-edge X-ray absorption spectroscopy. The deposited iron film thicknesses have been varied within 0.1–2 nm and the sample temperatures from room temperature to 700°C. It is shown that the intercalation process begins at temperatures higher than ~350°C. In this case, it is found that intercalated iron atoms are localized not only between graphene and a buffer layer coating SiC, but also under the buffer layer itself. The optimal conditions of the intercalation are realized in the range 400–500°C, because, at higher temperatures, the system becomes unstable due to the chemical interaction of the intercalated iron with silicon carbide. The inertness of the intercalated films to action of oxygen is demonstrated.

Sobre autores

M. Gomoyunova

Ioffe Institute

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021

G. Grebenyuk

Ioffe Institute

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021

V. Davydov

Ioffe Institute

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021

I. Ermakov

St. Petersburg National Research University of Information Technology, Mechanics, and Optics

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 197101

I. Eliseyev

St. Petersburg State University

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194034

A. Lebedev

Ioffe Institute

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021

S. Lebedev

Ioffe Institute; St. Petersburg National Research University of Information Technology, Mechanics, and Optics

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021; St. Petersburg, 197101

E. Lobanova

Ioffe Institute

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021

A. Smirnov

Ioffe Institute; St. Petersburg National Research University of Information Technology, Mechanics, and Optics

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021; St. Petersburg, 197101

D. Smirnov

St. Petersburg State University; Leibniz Institute for Solid State Physics and Material Research

Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194034; Dresden, 01069

I. Pronin

Ioffe Institute; St. Petersburg National Research University of Information Technology, Mechanics, and Optics

Autor responsável pela correspondência
Email: Igor.Pronin@mail.ioffe.ru
Rússia, St. Petersburg, 194021; St. Petersburg, 197101

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