Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Doping controlled Fano resonance in bilayer 1T$ ^{\prime} $-ReS$ _{2} $:
  Raman experiments and first-principles theoretical analysis   In the bilayer ReS$ _{2} $ channel of a field-effect transistor (FET), we
demonstrate using Raman spectroscopy that electron doping (n) results in
softening of frequency and broadening of linewidth of the in-plane vibrational
modes, leaving out-of-plane vibrational modes unaffected. Largest change is
observed for the in-plane Raman mode at $\sim$ 151 cm$^{-1} $, which also shows
doping induced Fano resonance with the Fano parameter 1/q = -0.17 at doping
concentration of $\sim 3.7\times10^{13}$ cm$^{-2} $. A quantitative
understanding of our results is provided by first-principles density functional
theory (DFT), showing that the electron-phonon coupling (EPC) of in-plane modes
is stronger than that of out-of-plane modes, and its variation with doping is
independent of the layer stacking. The origin of large EPC is traced to 1T to
1T$ ^{\prime} $ structural phase transition of ReS$ _{2} $ involving in-plane
displacement of atoms whose instability is driven by the nested Fermi surface
of the 1T structure. Results are also compared with the isostructural trilayer
ReSe$ _{2} $.

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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: stat
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The categories of this paper are: chao-dyn
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The categories of this paper are: eess
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The categories of this paper are: physics