Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two-gap superconductivity in Mo$_{8}$Ga$_{41}$ and its evolution upon
  the V substitution   Zero-field and transverse-field muon spin rotation/relaxation ($\mu$SR)
experiments were undertaken in order to elucidate microscopic properties of a
strongly-coupled superconductor Mo$_{8}$Ga$_{41}$ with $T_{\text{c}}=9.8$ K.
The upper critical field extracted from the transverse-field $\mu$SR data
exhibits significant reduction with respect to the data from thermodynamic
measurements indicating the coexistence of two independent length scales in the
superconducting state. Accordingly, the temperature-dependent magnetic
penetration depth of Mo$_{8}$Ga$_{41}$ is described using the model, in which
two s-wave superconducting gaps are assumed. The V for Mo substitution in the
parent compound leads to the complete suppression of one superconducting gap,
and Mo$_{7}$VGa$_{41}$ is well described within the single s-wave gap scenario.
The reduction in the superfluid density and the evolution of the
low-temperature resistivity upon the V substitution indicate the emergence of a
competing state in Mo$_{7}$VGa$_{41}$ that may be responsible for the closure
of one of the superconducting gaps.

31
The categories of this paper are: ao-sci
16
The categories of this paper are: stat
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
2
The categories of this paper are: math
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio