Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polaronic high-temperature superconductivity in optimally doped
  bismuthate Ba0:63K0:37BiO3   Magnetic measurements have been carried out in the superconducting and normal
states of the optimally doped nonmagnetic bismuthate superconductor
Ba0.63K0.37BiO3. The magnetic data along with previous muSR, resistivity, and
tunneling data consistently show that there is a large polaronic enhancement in
the density of states and effective electron-phonon coupling constant. The
first-principle calculation within the density-functional theory indicates a
small electron-phonon coupling constant of about 0.3-0.4, which can only lead
to about 1 K superconductivity within the conventional phonon-mediated
mechanism. Remarkably, the polaronic effect increases the electron-phonon
coupling constant to about 1.4, which is large enough to leads to 32 K
superconductivity. The present work thus uncovers the mystery of
high-temperature superconductivity in bismuthate superconductors, which will
also provide important insight into the pairing mechanism of other
high-temperature superconductors.

11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
22
The categories of this paper are: chao-dyn