Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Layer number determination in graphene using out-of-plane vibrations   We present a double-resonant Raman mode in few-layer graphene, which is able
to probe the number of graphene layers reliably. This so-called N mode on the
low-frequency side of the G mode results from a double-resonant
Stokes/anti-Stokes process combining a LO and a ZO' phonon. Simulations of the
double-resonant Raman spectra in bilayer graphene show very good agreement with
the experiments. The investigation of the out-of-plane ZO' phonon for layer
number determination is expected to be transferable to other layered materials
like boron nitride.

15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol