Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Single crystal growth and physical property characterizations of mixed
  valent compound YbFe$_2$Al$_{10}$   We report single crystal growth and physical properties characterization of
YbFe$_2$Al$_{10}$ compounds. The measurements of resistivity, magnetic
susceptibility, and specific heat show different behaviors from previous
studies on polycrystal samples. A mixed valent characteristic with moderate
mass enhancement is indicated. In particular, the optical spectroscopy
measurement reveals formation of multiple hybridization energy gaps which
become progressively pronounced at low temperature. The multiple hybridization
energy gaps are likely caused by the hybridizations between the flat band from
Yb 4$f$ electrons and different bands of conduction electrons.

6
The categories of this paper are: astro-ph
35
The categories of this paper are: mtrl-th
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol