Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the widths of Stokes lines in Raman scattering from molecules
  adsorbed at metal surfaces and in molecular conduction junctions   Within a generic model we analyze the Stokes linewidth in surface enhanced
Raman scattering (SERS) from molecules embedded as bridges in molecular
junctions. We identify four main contributions to the off-resonant Stokes
signal and show that under zero voltage bias (a situation pertaining also to
standard SERS experiments) and at low bias junctions only one of these
contributions is pronounced. The linewidth of this component is determined by
the molecular vibrational relaxation rate, which is dominated by interactions
with the essentially bosonic thermal environment when the relevant molecular
electronic energy is far from the metal(s) Fermi energy(ies). It increases when
the molecular electronic level is close to the metal Fermi level so that an
additional vibrational relaxation channel due to electron-hole (eh) excition in
the molecule opens. Other contributions to the Raman signal, of considerably
broader linewidths, can become important at larger junction bias.

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The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
2
The categories of this paper are: math
19
The categories of this paper are: eess
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph