Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Origin of Metallicity and Stability of the Metastable Phase in
  Chemically Exfoliated MoS$_2$   Chemical exfoliation of MoS$_2$ via Li-intercalation route has led to many
desirable properties and spectacular applications due to the presence of a
metastable state in addition to the stable H phase. However, the nature of the
specific metastable phase formed, and its basic charge conduction properties
have remained controversial. Using spatially resolved Raman spectroscopy (~1
micrometer resolution) and photoelectron spectroscopy (~120 nm resolution), we
probe such chemically exfoliated MoS$_2$ samples in comparison to a
mechanically exfoliated H phase sample and confirm that the dominant metastable
state formed by this approach is a distorted T' state with a small
semiconducting gap. Investigating two such samples with different extents of Li
residues present, we establish that Li+ ions, not only help to exfoliate
MoS$_2$ into few layer samples, but also contribute to enhancing the relative
stability of the metastable state as well as dope the system with electrons,
giving rise to a lightly doped small bandgap system with the T' structure,
responsible for its spectacular properties.

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The categories of this paper are: gr-qc
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The categories of this paper are: math
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The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: dg-ga
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph