Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Splitting of conductance resonance through a magnetic quantum dot in
  graphene   We report a dual resonance feature in ballistic conductance through a quantum
Hall graphene nanoribbon with a magnetic quantum dot. Such a magnetic quantum
dot localizes Dirac fermions exhibiting anisotropic eigenenergy spectra with
broken time-reversal symmetry. Interplay between the localized states and
quantum Hall edge states is found to be two-fold, showing Breit-Wigner and Fano
resonances, which is reminiscent of a double quantum dot system. By fitting the
numerical results with the Fano-Breit-Wigner lineshape from the double quantum
dot model, we demonstrate that the two-fold resonance is due to the valley
mixing that comes from the coupling of the magnetic quantum dot with quantum
Hall edge channels; an effective double quantum dot system emerges from a
single magnetic quantum dot in virtue of the valley degree of freedom. It is
further confirmed that the coupling is weaker for the Fano resonance and
stronger for the Breit-Wigner resonace.

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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess