Vibrational Property of α-Borophene Determined by Tip-Enhanced Raman Spectroscopy
Ping Zhang,
Xirui Tian,
Shaoxiang Sheng,
Chen Ma,
Linjie Chen,
Baojie Feng,
Peng Cheng,
Yiqi Zhang,
Lan Chen,
Jin Zhao,
Kehui Wu
Affiliations
Ping Zhang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Xirui Tian
Department of Physics, University of Science and Technology of China, Hefei 230026, China
Shaoxiang Sheng
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Chen Ma
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Linjie Chen
Department of Chemical Physics, School of Chemistry, University of Science and Technology of China, Hefei 230026, China
Baojie Feng
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Peng Cheng
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Yiqi Zhang
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Lan Chen
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Jin Zhao
CAS Key Laboratory of Strongly-Coupled Quantum Matter Physics, Department of Physics, University of Science and Technology of China, Hefei 230026, China
Kehui Wu
Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
We report a Raman characterization of the α borophene polymorph by scanning tunneling microscopy combined with tip-enhanced Raman spectroscopy. A series of Raman peaks were discovered, which can be well related with the phonon modes calculated based on an asymmetric buckled α structure. The unusual enhancement of high-frequency Raman peaks in TERS spectra of α borophene is found and associated with its unique buckling when landed on the Ag(111) surface. Our paper demonstrates the advantages of TERS, namely high spatial resolution and selective enhancement rule, in studying the local vibrational properties of materials in nanoscale.
