Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrical Modulation of Superconducting Critical Temperature in
  Liquid-Gated Thin Niobium Films   We demonstrate that the superconducting critical temperature (Tc) of thin
niobium films can be electrically modulated in a liquid-gated geometry device.
Tc can be suppressed and enhanced by applying positive and negative gate
voltage, respectively, in a reversible manner within a range of about 0.1 K. At
a fixed temperature below Tc, we observed that the superconducting critical
current can be modulated by gate voltage. This result suggests a possibility of
an electrically-controlled switching device operating at or above liquid helium
temperature, where superconductivity can be turned on or off solely by the
applied gate voltage.

34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
26
The categories of this paper are: bayes-an
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol