Dielectric function of epitaxial quasi-freestanding monolayer graphene on Si-face 6H-SiC in a broad spectral range

被引：12

作者：

Tikuisis, Kristupas Kazimieras ^{[1
]}

Dubroka, Adam ^{[2
]}

Uhlirova, Klara ^{[1
]}

Speck, Florian ^{[3
]}

Seyller, Thomas ^{[3
]}

Losurdo, Maria ^{[4
]}

Orlita, Milan ^{[5
]}

Veis, Martin ^{[1
]}

机构：

[1] Charles Univ Prague, Fac Math & Phys, Ke Karlovu 2027-3, Prague 12116 2, Czech Republic

[2] Masaryk Univ, Fac Sci, Dept Condensed Matter Phys, Kotlarska 2, Brno 61137, Czech Republic

[3] Tech Univ Chemnitz, Inst Phys, Reichenhainer Str 70, D-09126 Chemnitz, Germany

[4] CNR NANOTEC, Inst Nanotechnol, Via Orabona 4, I-70126 Bari, Italy

[5] CNRS, Lab Natl Champs Magnet Intenses Grenoble, 25 Martyrs Ave,BP 166, F-38042 Grenoble 9, France

来源：

PHYSICAL REVIEW MATERIALS | 2023年 / 7卷 / 04期

关键词：

VAN-HOVE SINGULARITIES; OPTICAL-PROPERTIES; 1ST-PRINCIPLES;

D O I：

10.1103/PhysRevMaterials.7.044201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present a study of the optical properties of quasi-freestanding epitaxial monolayer graphene grown on the Si face of 6H-SiC (0001) in a broad spectral range from midinfrared to ultraviolet. After growth, the sample was intercalated by hydrogen in order to ensure that no dangling bonds between the substrate and graphene layer remain. Spectral dependence of the dielectric function of graphene was parametrized based on spectroscopic ellipsometry fits. We show that, from the viewpoint of optical properties, the investigated sample is very close to exfoliated graphene. We provide information about the spectral dependence of the complex dielectric function of quasi-freestanding graphene in a broad spectral range.

引用

页数：7

共 40 条

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