Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Resonant quenching of Raman scattering due to out-of-plane
  A$_{1g}$/A'$_1$ modes in few-layer MoTe$_2$   Temperature-dependent (5 K to 300 K) Raman scattering study of
A$_{1g}$/A'$_1$ phonon modes in mono-layer (1L), bilayer (2L), trilayer (3L),
and tetralayer (4L) MoTe$_2$ is reported. The temperature evolution of the
modes' intensity critically depends on the flake thickness. In particular with
$\lambda$=632.8 nm light excitation, a strongly non-monotonic dependence of the
A$_{1g}$ mode intensity is observed in 2L MoTe$_2$. The intensity decreases
with decreasing temperature down to 220 K and the A$_{1g}$ mode almost
completely vanishes from the Stokes scattering spectrum in the temperature
range between 160 K and 220 K. The peak recovers at lower temperatures and at
T=5 K it becomes three times more intense that at room temperature. Similar
non-monotonic intensity evolution is observed for the out-of-plane mode in 3L
MoTe$_2$ in which tellurium atoms in all three layers vibrate in-phase. The
intensity of the other out-of-plane Raman-active mode, (with vibrations of
tellurium atoms in the central layer shifted by 180$^o$ with respect to the
vibrations in outer layers), only weakly depends on temperature. The observed
quenching of the Raman scattering in 2L and 3L MoTe$_2$ is attributed to a
destructive interference between the resonant and non-resonant contributions to
the Raman scattering amplitude. The observed "antiresonance" is related to the
electronic excitation at the M point of the Brillouin zone in few-layer
MoTe$_2$.

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The categories of this paper are: econ
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The categories of this paper are: astro-ph
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The categories of this paper are: supr-con
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: ao-sci
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The categories of this paper are: nlin
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The categories of this paper are: q-alg