Analysis of Cobalt Intercalation under the Buffer Carbon Layer on a SiC(0001) Single Crystal

Filnov, S. O.; Rybkina, A. A.; Тарасов, А. В.; Eryzhenkov, A. V.; Eliseyev, I. A.; Davydov, V. Yu.; Shikin, A. M.; Рыбкин, А. Г.

doi:10.1134/s1063776122020121

Cited by 8 publications

(8 citation statements)

References 34 publications

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“…Apart from graphene states, the electron structure includes non-dispersing flat bands at 2.8 and 7.5 eV, which may be related to CoSi compound, according to the theoretical calculations of the bulk density of states [28] and experimental ARPES-data [29]. Besides, calculations of the band structure of graphene on CoSi in paper [14], demonstrated availability of such states at the binding energy around 2.8 eV.…”

Section: Resultsmentioning

confidence: 88%

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Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)

Rybkina

Filnov

Glazkova

et al. 2022

Physics of the Solid State

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Graphene grown on an ultrathin CoSi/CoSi2 silicide layer atop a SiC(0001) substrate and intercalated by Au was studied. Intercalation of Au was found to occur at a temperature of 500oC, and it is accompanied by the formation of gold silicide under graphene with a stoichiometry close to Au2Si. The study of the electronic structure of the system in the region of the (K) point of the surface Brillouin zone revealed the quasi-freestanding character of graphene with a linear spectrum of π states and a Dirac point near the Fermi level. Photoelectron microscopy revealed the homogeneity of the work function along the surface of the sample on a micrometer scale. Keywords: Graphene, magneto-spin-orbit graphene, intercalation, photoelectron spectroscopy, electronic structure.

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Section: Resultsmentioning

confidence: 88%

“…To solve this task, we at first intercalated Co atoms under a buffer layer of graphene on substrate 6H-SiC(0001) [13,14]. Buffer layer is a graphene-like surface layer with (6…”

Section: Introductionmentioning

confidence: 99%

Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)

Rybkina

Filnov

Glazkova

et al. 2022

Physics of the Solid State

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“…The Si level is decomposed into six peaks. Two peaks shown in dark green correspond to silicon in the SiC substrate, three peaks shown in light green assumingly correspond to metal silicides [34,36,38,39,47], and the left 103.6-eV peak corresponds to SiO 2 [48,49]. The Fe level is decomposed into three components: the main component shown in blue and satellites characteristic of the ground levels of metals.…”

Section: Resultsmentioning

confidence: 99%

“…To induce magnetism in the Gr/SiC system (Gr is graphene), a layer of magnetic atoms is formed between graphene and SiC by means of intercalation. Some studies were devoted to Gr/MM/SiC systems (MM is a magnetic metal), where atoms of transition (Fe, Co) [34][35][36][37][38][39] and rare-earth (Eu, Dy, Gd, Er) [40][41][42] metals were used as intercalated elements. However, despite a quite high magnetic ordering temperature in pure compounds of these elements, the resulting systems have a paramagnetic or ferromagnetic order with a low magnetic ordering temperature compared to ordering temperature in bulk samples of these elements.…”

Section: Introductionmentioning

confidence: 99%

“…At the next stage of the formation of the system, 14-Å-thick iron and 7-Å-thick cobalt films were alternatingly deposited by means of physical vapor-phase deposition on the substrate heated to 450°C with the subsequent heating to 600°C in 15 min after each deposition. As shown in[34,36,38], this method is appropriate for the intercalation of both Fe and Co atoms.To analyze the formed system, we carried out XPS measurements at different detection angles of photoelectrons. Figure2shows the measurements of core levels of the system.…”

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Joint Intercalation of Ultrathin Fe and Co Films under a Graphene Buffer Layer on a SiC(0001) Single Crystal

et al. 2023

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The joint intercalation of Co and Fe atoms under a graphene buffer layer synthesized on a SiC(0001) single crystal has been studied. Intercalation has been performed by means of the alternating deposition of ultrathin Fe and Co metal films on the substrate heated to 450°C with the subsequent heating to 600°C in 15 min. It has been shown that Co and Fe atoms under these conditions are intercalated under graphene, forming compounds with silicon and with each other. The existence of a magnetic order in the system up to room temperature has been demonstrated using a superconducting quantum interferometer. A possible stoichiometry of the formed alloys has been analyzed using data on the shape and magnitude of hysteresis loops. In addition, it has been found that Fe and Co in the system exposed to the atmosphere are not oxidized. Thus, graphene protects the formed system. This study makes contribution to the investigation of graphene in contact with magnetic metals and promotes its application in spintronic and nanoelectronic devices.

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Room Temperature Ferromagnetism in Graphene/SiC(0001) System Intercalated by Fe and Co

Filnov,

Estyunin,

Klimovskikh

et al. 2023

Physica Rapid Research Ltrs

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The utilization of graphene on silicon carbide (SiC) substrates holds substantial promise for advancements in spintronics and nanoelectronics. Furthermore, incorporating magnetic metals provides an optimal framework for probing fundamental physical phenomena. The approach to developing such systems is in situ intercalation of graphene with magnetic metals. Herein, the electronic structure is analyzed and the magnetic properties of the system are synthesized by the thermal decomposition of 6H‐SiC(0001) surface and subsequent intercalation of graphene with cobalt (Co) and iron (Fe) atoms. X‐ray photoemission spectroscopy and low‐energy electron diffraction are employed to control the synthesis and metal intercalation processes. The morphological characteristics of the synthesized system are studied by means of atomic force microscopy. The findings derived from magneto‐optic Kerr effect measurements reveal a homogeneous ferromagnetic ordering at room temperature. Angle‐resolved photoemission spectroscopy is used to ascertain the impact of intercalation on graphene's electronic structure. The results of this study are essential for the development of graphene‐based spintronics and nanoelectronic devices as well as for fundamental studies in magnetic graphene systems.

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Analysis of Cobalt Intercalation under the Buffer Carbon Layer on a SiC(0001) Single Crystal

Cited by 8 publications

References 34 publications

Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)

Effect of gold intercalation on the electronic structure of graphene on Co-Si/SiC(0001)

Joint Intercalation of Ultrathin Fe and Co Films under a Graphene Buffer Layer on a SiC(0001) Single Crystal

Room Temperature Ferromagnetism in Graphene/SiC(0001) System Intercalated by Fe and Co

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