Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Realization of metallic state in 1T-TaS2 with persisting long-range
  order of charge density wave   Metallization of 1T-TaS2 is generally initiated at the domain boundary of
charge density wave (CDW), at the expense of its long-range order. However, we
demonstrate in this study that the metallization of 1T-TaS2 can be also
realized without breaking the long-range CDW order upon surface alkali doping.
By using scanning tunneling microscopy, we find the long-range CDW order is
always persisting, and the metallization is instead associated with additional
in-gap excitations. Interestingly, the in-gap excitation is near the top of the
lower Hubbard band, in contrast to a conventional electron-doped Mott insulator
where it is beneath the upper Hubbard band. In combination with the numerical
calculations, we suggest that the appearance of the in-gap excitations near the
lower Hubbard band is mainly due to the effectively reduced on-site Coulomb
energy by the adsorbed alkali ions.

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The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
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The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
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The categories of this paper are: q-bio