title: ÐÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ðµ ÑÐ¾ÑÐ¼Ð¸ÑÐ¾Ð²Ð°Ð½Ð¸Ñ ÑÐ¸Ð»Ð¸ÑÐ¸Ð´Ð¾Ð² ÐºÐ¾Ð±Ð°Ð»ÑÑÐ° Ð¿Ð¾Ð´ Ð³ÑÐ°ÑÐµÐ½Ð¾Ð¼ Ð½Ð° ÐºÐ°ÑÐ±Ð¸Ð´Ðµ ÐºÑÐµÐ¼Ð½Ð¸Ñ
title: Ð²ÑÐ¿ÑÑÐºÐ½Ð°Ñ ÐºÐ²Ð°Ð»Ð¸ÑÐ¸ÐºÐ°ÑÐ¸Ð¾Ð½Ð½Ð°Ñ ÑÐ°Ð±Ð¾ÑÐ° Ð±Ð°ÐºÐ°Ð»Ð°Ð²ÑÐ°
titleType: Subtitle
title: Formation of cobalt silicides under graphene grown on silicon carbide via graphene intercalation with cobalt and silicon
Creators: name: ÐÑÐ¾Ð¼Ð¾Ð², ÐÐ°ÑÐ¸Ð»Ð¸Ð¹
Publisher: name: Ð¡Ð°Ð½ÐºÑ-ÐÐµÑÐµÑÐ±ÑÑÐ³ÑÐºÐ¸Ð¹ Ð¿Ð¾Ð»Ð¸ÑÐµÑÐ½Ð¸ÑÐµÑÐºÐ¸Ð¹ ÑÐ½Ð¸Ð²ÐµÑÑÐ¸ÑÐµÑ ÐÐµÑÑÐ° ÐÐµÐ»Ð¸ÐºÐ¾Ð³Ð¾
Year: 2020
Subjects: Ð³ÑÐ°ÑÐµÐ½
ÐºÐ¾Ð±Ð°Ð»ÑÑ
Ð¸Ð½ÑÐµÑÐºÐ°Ð»ÑÑÐ¸Ñ
Ð¼ÐµÑÐ¾Ð´ ÑÑÐ½ÐºÑÐ¸Ð¾Ð½Ð°Ð»Ð° Ð¿Ð»Ð¾ÑÐ½Ð¾ÑÑÐ¸
Quantum ESPRESSO
graphene
cobalt
intercalation
density functional theory

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description: This work is devoted to the formation of cobalt silicides under graphene grown on silicon carbide via graphene intercalation with cobalt and silicon. During the study, the following tasks were solved: 1. Analysis of the intercalation process of cobalt and silicon atoms under graphene. 2. Analysis of the spectra obtained by photoelectron spectroscopy. 3. Ab initio calculations of the electronic structure. 4. Graphical interpretation of the data obtained. The work was carried out on the basis of Ioffe Institute. The experiments were carried out at the station of the Russian-German laboratory at the BESSY II synchrotron using methods of X-ray photoelectron spectroscopy and low-energy electron diffraction. First-principle calculations of the electronic structure were performed by the density functional theory using the computing cluster of the Physical electronics department. It is shown that graphene intercalation with cobalt and silicon proceeds most efficiently at a temperature of 450Â°C. This process is accompanied by the formation of cobalt silicides under graphene. An analysis of the electronic structure of the system showed that the hybridization of the electronic states of graphene and the substrate is less pronounced than upon contact of graphene with a metal. It is also established that graphene is charge neutral in this system.