Tip-induced creation and Jahn-Teller distortions of sulfur vacancies in single-layer MoS_2
arxiv(2024)
摘要
We present an atomically precise technique to create sulfur vacancies and
control their atomic configurations in single-layer MoS_2. It involves
adsorbed Fe atoms and the tip of a scanning tunneling microscope, which enables
single sulfur removal from the top sulfur layer at the initial position of Fe.
Using scanning tunneling spectroscopy, we show that the STM tip can also induce
two Jahn-Teller distorted states with reduced orbital symmetry in the sulfur
vacancies. Density functional theory calculations rationalize our experimental
results. Additionally, we provide evidence for molecule-like hybrid orbitals in
artificially created sulfur vacancy dimers, which illustrates the potential of
our technique for the development of extended defect lattices and tailored
electronic band structures.
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