Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Scanning tunneling microscopic evidence of interface enhanced high-Tc
  superconductivity in Pb islands grown on SrTiO3   The discovery of the interface enhanced superconductivity in the single layer
film of FeSe epitaxially grown on SrTiO3 substrates has triggered a flurry of
activity in the field of superconductivity. It raised the hope to find more
conventional high-Tc superconductors which are purely driven by the
electron-phonon interaction at ambient pressure. Here we report the
experimental evidence from the measurement of scanning tunneling spectroscopy
for the interface enhanced high-Tc superconductivity in the Pb thin film
islands grown on SrTiO3 substrates. The superconducting energy gap of the Pb
film is found to depend on both the thickness and the volume of the islands.
The largest superconducting energy gap is found to be about 10 meV, which is 7
times larger than that in the bulk Pb. The corresponding superconducting
transition temperature, estimated by fitting the temperature dependence of the
gap values using the BCS formula, is found to be 47 K, again 7 times higher
than that of the bulk Pb.

17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
26
The categories of this paper are: bayes-an
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg