Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: First-principles study on the electron-phonon coupling and
  magnetoresistance of LaBi under pressure   The extremely large magnetoresistance (XMR) material LaBi was reported to
become superconducting under pressure accompanying with suppressed
magnetoresistance. However, the underlying mechanism is unclear. By using
first-principles electronic structure calculations in combination with a
semiclassical model, we have studied the electron-phonon coupling and
magnetoresistance of LaBi in the pressure range from 0 to 18 GPa. Our
calculations show that LaBi undergoes a structural phase transition from a
face-centered cubic lattice to a primitive tetragonal lattice at $\sim$7 GPa,
verifying previous experimental results. Meanwhile, LaBi remains topologically
nontrivial across the structural transition. Under all pressures that we have
studied, the phonon-mediated mechanism based on the weak electron-phonon
coupling cannot account for the observed superconductivity in LaBi, and the
calculated magnetoresistance for LaBi does not show a suppression. The distinct
difference between our calculations and experimental observations suggests
either the existence of extra Bi impurities in the real LaBi compound or the
possibility of other unknown mechanism.

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The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
1
The categories of this paper are: cs
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
0
The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
28
The categories of this paper are: alg-geom