Quasi-freestanding graphene on SiC(0001) via cobalt intercalation of zero-layer graphene

被引：7

作者：

Rybkina, A. A. ^{[1
]}

Filnov, S. O. ^{[1
]}

Tarasov, A., V ^{[1
]}

Danilov, D., V ^{[1
]}

Likholetova, M., V ^{[1
]}

Voroshnin, V. Yu ^{[1
,2
]}

Pudikov, D. A. ^{[1
]}

Glazkova, D. A. ^{[1
]}

Eryzhenkov, A., V ^{[1
]}

Eliseyev, I. A. ^{[1
]}

Davydov, V. Yu ^{[3
]}

Shikin, A. M. ^{[1
]}

Rybkin, A. G. ^{[1
]}

机构：

[1] St Petersburg State Univ, St Petersburg 198504, Russia

[2] Elektronenspeicherring BESSY II, Helmholtz Zentrum Berlin Mat & Energie, Albert Einstein Str 15, D-12489 Berlin, Germany

[3] Ioffe Inst, St Petersburg 194021, Russia

来源：

PHYSICAL REVIEW B | 2021年 / 104卷 / 15期

基金：

俄罗斯科学基金会; 俄罗斯基础研究基金会;

关键词：

X-RAY PHOTOEMISSION; ELECTRONIC-STRUCTURE; MAGNETIC-PROPERTIES; RAMAN-SPECTROSCOPY; CARBON; FILMS; MORPHOLOGY; ANISOTROPY; SILICIDES; NICKEL;

D O I：

10.1103/PhysRevB.104.155423

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Modification of the electronic and crystal structure of zero-layer graphene grown on 6H-SiC(0001) after Co intercalation is reported. Using a wide range of techniques including angle-resolved photoelectron spectroscopy, x-ray photoelectron spectroscopy, Raman spectroscopy, low-energy electron diffraction, we found that zero-layer graphene on SiC transforms into graphene monolayer as a result of cobalt intercalation. The Dirac cone of pi band characteristic of quasi-freestanding graphene is observed. In combination with high-resolution transmission electron microscopy and atomic force microscopy data, we conclude that ultrathin silicide CoSi/CoSi2 structure is formed between graphene and SiC substrate. Investigation of magnetic properties reveals ferromagnetic behavior with open hysteresis loop. The results of this work are the basis for further implementation of magneto-spin-orbit graphene on a semiconducting substrate and are important for the future application of such graphene in spintronics.

引用

页数：12

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