Calcium intercalation underneath N-layer graphene on 6H-SiC(0001)

被引：11

作者：

Zhang, Yuxi ^{[1
,2
]}

Zhang, Hanjie ^{[1
,2
]}

Cai, Yiliang ^{[3
]}

Song, Junjie ^{[4
]}

Qiao, Dan ^{[1
,2
]}

Chen, Qiaoyue ^{[1
,2
]}

Hu, Fang ^{[4
]}

Wang, Peng ^{[5
]}

Huang, Kaikai ^{[1
,2
]}

He, Pimo ^{[1
,2
]}

机构：

[1] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[2] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

[3] Zhejiang Univ Water Resources & Elect Power, Dept Fundamental Sci, Hangzhou 310018, Zhejiang, Peoples R China

[4] Zhejiang Univ, Ningbo Inst Technol, Sch Informat Sci & Engn, Ningbo 315100, Zhejiang, Peoples R China

[5] Shandong Univ Sci & Technol, Coll Elect Commun & Phys, Qingdao 266590, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2018年 / 703卷

基金：

国家重点研发计划; 中国国家自然科学基金;

关键词：

Epitaxial Graphene; Metal intercalation; Scanning tunneling microscopy; Density functional theory; BILAYER GRAPHENE; GROWTH; GAS;

D O I：

10.1016/j.cplett.2018.05.014

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Calcium intercalation underneath epitaxial graphene on 6H-SiC(0001) were investigated by scanning tunneling microcopy (STM) and density functional theory (DFT) calculations. After the preparation of calcium-adsorbed graphene on 6H-SiC(0001), annealing the sample to 900 degrees C activated the intercalation of the adsorbed calcium into buffer layer (BL), monolayer (1L) and bilayer epitaxial (2L) graphene. Subsequent DFT modeling show the dependence of the most stable intercalation sites for calcium underneath BL, 1L and 2L graphene on the intercalation density. Further DFT calculations indicate charge transfer from the intercalant into graphene layers, leading to the n-type doping of the calcium-intercalated BL, 1L and 2L graphene. (C) 2018 Published by Elsevier B.V.

引用

页码：33 / 38

页数：6

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