Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semiconductor-to-Metal Transition in the Bulk of WSe2 upon Potassium
  Intercalation   We present electron energy-loss spectroscopic measurements of potassium (K)
intercalated tungsten diselenide (WSe2). After exposure of pristine WSe2 films
to potassium, we observe a charge carrier plasmon excitation at about 0.97 eV,
which indicates a semiconductor to metal transition. Our data signal the
formation of one particular doped K-WSe2 phase. A Kramers-Kronig analysis (KKA)
allows the determination of the dielectric function and to estimate the
composition of about K0.6WSe2. Momentum dependent measurements reveal a
substantial plasmon dispersion to higher energies.

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The categories of this paper are: solv-int
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The categories of this paper are: eess
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: nucl-th
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph