Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effects of electron-phonon interactions on the electron tunneling
  spectrum of PbS quantum dots   We present a tunnel spectroscopy study of single PbS Quantum Dots (QDs) as
function of temperature and gate voltage. Three distinct signatures of strong
electron-phonon coupling are observed in the Electron Tunneling Spectrum (ETS)
of these QDs. In the shell-filling regime, the $8\times$ degeneracy of the
electronic levels is lifted by the Coulomb interactions and allows the
observation of phonon sub-bands that result from the emission of optical
phonons. At low bias, a gap is observed in the ETS that cannot be closed with
the gate voltage, which is a distinguishing feature of the Franck-Condon (FC)
blockade. From the data, a Huang-Rhys factor in the range $S\sim 1.7 - 2.5$ is
obtained. Finally, in the shell tunneling regime, the optical phonons appear in
the inelastic ETS $d^2I/dV^2$.

15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci