Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equilibration and Filtering of Quantum Hall Edge States in Few-Layer
  Black Phosphorus   We realize p-p'-p junctions in few-layer black phosphorus (BP) devices, and
use magneto-transport measurements to study the equilibration and transmission
of edge states at the interfaces of regions with different charge densities. We
observe both full equilibration, where all edge channels equilibrate and are
equally partitioned at the interfaces, and partial equilibration, where only
equilibration only takes place among modes of the same spin polarization.
Furthermore, the inner p'-region with low-doping level in the junction can
function as a filter for highly doped p-regions which demonstrates gate-tunable
transmission of edge channels.

30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
28
The categories of this paper are: alg-geom
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys