Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-throughput investigation of tunable superconductivity in FeSe films   There is an ongoing debate about the relative importance of structural change
versus doping charge carriers on the mechanism of superconductivity in Fe-based
materials. Elucidating this issue is a major challenge since it would require a
large number of samples where structure properties or the carrier density is
systematically varied. FeSe, with its structural simplicity, is an ideal
platform for addressing this question. It has been demonstrated that the
superconductivity in this material can be controlled through crystal lattice
tuning, as well as electronic structure manipulation. Here, we apply a
high-throughput methodology to FeSe to systematically delineate the
interdependence of its structural and electronic properties. Using a dual-beam
pulsed laser deposition, we have generated FeSe films with a marked gradient in
the superconducting transition temperature (below 2 K < Tc < 12 K) across 1 cm
width of the films. The Tc gradient films display ~ 1% continuous stretch and
compression in the out-of-plane and in-plane lattice constants respectively,
triggering the continuous enhancement of superconductivity. Combining transport
and angular-resolved photoemission measurements on uniform FeSe films with
tunable Tc from 3 K to 14 K, we find that the electron carrier density is
intimately correlated with Tc, i.e., it increases by a factor of 6 and
ultimately surpasses the almost constant hole concentration. Our transmission
electron microscope and band structure calculations reveal that rather than by
shifting the chemical potential, the enhanced superconductivity is linked to
the selective adjustment of the dxy band dispersion across the Fermi level by
means of reduced local lattice distortions. Therefore, such novel mechanism
provides a key to understand discrete superconducting phases in FeSe.

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The categories of this paper are: nucl-ex
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The categories of this paper are: stat
10
The categories of this paper are: q-bio
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
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The categories of this paper are: supr-con
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The categories of this paper are: funct-an
3
The categories of this paper are: physics
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The categories of this paper are: eess