Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Manipulating electron waves in graphene using carbon nanotube gating   Graphene with its dispersion relation resembling that of photons offers ample
opportunities for applications in electron optics. The spacial variation of
carrier density by external gates can be used to create electron waveguides, in
analogy to optical fiber, with additional confinement of the carriers in
bipolar junctions leading to the formation of few transverse guiding modes. We
show that waveguides created by gating graphene with carbon nanotubes (CNTs)
allow obtaining sharp conductance plateaus, and propose applications in
Aharonov-Bohm and two-path interferometers, and point-like source for injection
of carriers in graphene. Other applications can be extended to Bernal-stacked
or twisted bilayer graphene or two-dimensional electron gas. Thanks to their
versatility, CNT-induced waveguides open various possibilities for electron
manipulation in graphene-based devices.

25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
16
The categories of this paper are: stat
19
The categories of this paper are: eess
28
The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs