Publication Date:
2018-05-22
Description:
Author(s): Si-Yu Li, Ke-Ke Bai, Wei-Jie Zuo, Yi-Wen Liu, Zhong-Qiu Fu, Wen-Xiao Wang, Yu Zhang, Long-Jing Yin, Jia-Bin Qiao, and Lin He Even after a decade of research, a fundamental controversy persists concerning the electronic structure of a suspended graphene monolayer, as revealed by scanning tunneling spectroscopy (STS). Is the spectrum truly gapped, or V-shaped? This study systematically shows that substrate interaction can affect the STS spectrum of graphene crucially, by suppressing out-of-plane phonons and thus eliminating any gap. Switching the tunneling spectrum of graphene with voltage pulses through the probe’s tip is also demonstrated. This sort of clear understanding is needed for successful engineering of related graphene devices. [Phys. Rev. Applied 9, 054031] Published Mon May 21, 2018
Electronic ISSN:
2331-7019
Topics:
Physics
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