Observation of a Folded Dirac Cone in Heavily Doped Graphene

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成果类型：

期刊论文

作者：

Wang, Can*;Wang, Kaili;Wang, Huaiqiang;Tian, Qichao;Zong, Junyu;...

通讯作者：

Wang, Can;Zhang, Y;Wang, C

作者机构：

[Wang, Can; Zhang, Haijun; Zhang, Yi; Zong, Junyu; Wang, Huaiqiang; Wang, Kaili; Qiu, Xiaodong; Tian, Qichao] Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.

[Wang, Li; Li, Fang-Sen; Ren, Wei] Chinese Acad Sci, Suzhou Inst Nanotech & Nanob SINANO, Vacuum Interconnected Nanotech Workstat Nano X, Suzhou 215123, Peoples R China.

[Wang, Can; Zhang, Wei-Bing] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Hunan Prov Key Lab Flexible Elect Mat Genome Engn, Changsha 410114, Peoples R China.

[Wang, Can; Zhang, Haijun; Zhang, Yi] Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China.

[Wang, C] Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Hunan Prov Key Lab Flexible Elect Mat Genome Engn, Changsha 410114, Peoples R China.

通讯机构：

[Wang, C ; Wang, C; Zhang, Y ]

Nanjing Univ, Sch Phys, Natl Lab Solid State Microstruct, Nanjing 210093, Peoples R China.

Changsha Univ Sci & Technol, Sch Phys & Elect Sci, Hunan Prov Key Lab Flexible Elect Mat Genome Engn, Changsha 410114, Peoples R China.

Nanjing Univ, Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Peoples R China.

语种：

英文

期刊：

Journal of Physical Chemistry Letters

ISSN：

1948-7185

年：

2023

卷：

期：

页码：

7149-7156

DOI：

10.1021/acs.jpclett.3c01271

基金类别：

National Natural Science Foundation of China [92165205, 11674165, 12004172]; National Key Ramp;D Program of China [2018YFA0306800]; Fok Ying-Tong Education Foundation of China [161006]; Program for High-Level Entrepreneurial and Innovative Talents Introduction of Jiangsu Province

机构署名：

本校为通讯机构

院系归属：

物理与电子科学学院

摘要：

Superlattice potentials imposed on graphene can alter its Dirac states, enabling the realization of various quantum phases. We report the experimental observation of a replica Dirac cone at the Brillouin zone center induced by a superlattice in heavily doped graphene with Gd intercalation using angle-resolved photoemission spectroscopy (ARPES). The replica Dirac cone arises from the (root 3x root 3)R30 degrees superlattice formed by the intervalley coupling of two nonequivalent valleys (e.g., the Kekule '-like distortion phase), accompanied by a bandgap opening. According to the findings, the ...

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Observation of a Folded Dirac Cone in Heavily Doped Graphene

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