Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nodal Superconductivity with Multiple Gaps in SmFeAsO$_{0.9}$F$_{0.1}$   We report the observation of two gaps in the superconductor
SmFeAsO$_{0.9}$F$_{0.1}$ (F-SmFeAsO) with $T_c=51.5K$ as measured by
point-contact spectroscopy. Both gaps decrease with temperature and vanish at
$T_c$ and the temperature dependence of the gaps are described by the
theoretical prediction of the Bardeen-Cooper-Schrieffer (BCS) theory. A
zero-bias conductance peak (ZBCP) was observed, indicating the presence of
Andreev bound states at the surface of F-SmFeAsO. Our results strongly suggest
an unconventional nodal superconductivity with multiple gaps in F-SmFeAsO.

9
The categories of this paper are: nlin
13
The categories of this paper are: quant-ph
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
2
The categories of this paper are: math