Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anomalous resistivity upturn in epitaxial L21-Co2MnAl films   We report the controllable growth and the intriguing transport behavior of
high-spin-polarization epitaxial L21-Co2MnAl films, which exhibit a
low-temperature (T) resistivity upturn with pronounced T1/2 dependence, close
relevance to structural disorder, and robust independence of magnetic fields.
The resistivity upturn turns out to be qualitatively contradictory to weak
localization, particle-particle channel electron-electron interaction (EEI),
and orbital two-channel Kondo effect, leaving a three-dimensional particle-hole
channel EEI the most likely physical source. Our result highlights a
considerable tunability of the structural and electronic disorder of magnetic
films by varying growth temperature, affording unprecedented insights into the
spin polarization and the resistivity upturn.

2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin