Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pressure dependence of superconducting critical temperature and upper
  critical field of 2H-NbS2   We present measurements of the superconducting critical temperature Tc and
upper critical field Hc2 as a function of pressure in the transition metal
dichalcogenide 2H-NbS2 up to 20 GPa. We observe that Tc increases smoothly from
6K at ambient pressure to about 8.9K at 20GPa. This range of increase is
comparable to the one found previously in 2H-NbSe2. The temperature dependence
of the upper critical field Hc2(T) of 2H-NbS2 varies considerably when
increasing the pressure. At low pressures, Hc2(0) decreases, and at higher
pressures both Tc and Hc2(0) increase simultaneously. This points out that
there are pressure induced changes of the Fermi surface, which we analyze in
terms of a simplified two band approach.

15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
19
The categories of this paper are: eess
18
The categories of this paper are: econ
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph