Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconducting proximity effect in a topological insulator using
  Fe(Te,Se)   Interest in the superconducting proximity effect has recently been reignited
by theoretical predictions that it could be used to achieve topological
superconductivity. Low-T$_{c}$ superconductors have predominantly been used in
this effort, but small energy scales of ~1 meV have hindered the
characterization of the emergent electronic phase, limiting it to extremely low
temperatures. In this work, we use molecular beam epitaxy to grow topological
insulator Bi$_{2}$Te$_{3}$ in a range of thicknesses on top of a high-T$_{c}$
superconductor Fe(Te,Se). Using scanning tunneling microscopy and spectroscopy,
we detect {\Delta}$_{ind}$ as high as ~3.5 meV, which is the largest reported
gap induced by proximity to an s-wave superconductor to-date. We find that
{\Delta}$_{ind}$ decays with Bi$_{2}$Te$_{3}$ thickness, but remains finite
even after the topological surface states had been formed. Finally, by imaging
the scattering and interference of surface state electrons, we provide a
microscopic visualization of the fully gaped Bi$_{2}$Te$_{3}$ surface state due
to Cooper pairing. Our results establish Fe-based high-T$_{c}$ superconductors
as a promising new platform for realizing high-T$_{c}$ topological
superconductivity.

25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat