Details

Autor(en) / Beteiligte

• Bao, Changhua
• Zhang, Hongyun
• Zhang, Teng
• Wu, Xi
• Luo, Laipeng
• Zhou, Shaohua
• Li, Qian
• Hou, Yanhui
• Yao, Wei
• Liu, Liwei
• Yu, Pu
• Li, Jia
• Duan, Wenhui
• Yao, Hong
• Wang, Yeliang
• Zhou, Shuyun

Titel

Experimental Evidence of Chiral Symmetry Breaking in Kekulé-Ordered Graphene

Ist Teil von

• Physical review letters, 2021-05, Vol.126 (20), p.1-206804, Article 206804

Ort / Verlag

College Park: American Physical Society

Erscheinungsjahr

2021

Link zum Volltext

Quelle

American Physical Society

Beschreibungen/Notizen

• The low-energy excitations of graphene are relativistic massless Dirac fermions with opposite chiralities at valleys K and K′. Breaking the chiral symmetry could lead to gap opening in analogy to dynamical mass generation in particle physics. Here we report direct experimental evidences of chiral symmetry breaking (CSB) from both microscopic and spectroscopic measurements in a Li-intercalated graphene. The CSB is evidenced by gap opening at the Dirac point, Kekulé-O type modulation, and chirality mixing near the gap edge. Our work opens up opportunities for investigating CSB related physics in a Kekulé-ordered graphene.