Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enhancement of superconducting transition temperature in
  electrochemically etched FeSe/LaAlO$_3$ films   In this study, we investigated the gate voltage dependence of $T_{\mathrm c}$
in electrochemically etched FeSe films with an electric-double layer transistor
structure. The $T_{\mathrm c}^{\mathrm {zero}}$ value of the etched FeSe films
with a lower gate voltage ($V_{\mathrm g}$ = 2.5 and 3.3 V) reaches 46 K, which
is the highest value among almost all reported values from the resistivity
measurements except for the data by Ge et al. This enhanced $T_{\mathrm c}$
remains unchanged even after the discharge process, unlike the results for
electrostatic doping without an etching process. Our results suggest that the
origin of the increase in $T_{\mathrm c}$ is not electrostatic doping but
rather the electrochemical reaction at the surface of an etched films.

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The categories of this paper are: hep-ph
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
18
The categories of this paper are: econ
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an