Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Clean quantum point contacts in an InAs quantum well grown on a
  lattice-mismatched InP substrate   Strong spin-orbit coupling, the resulting large $g$-factor, and small
effective mass make InAs an attractive material platform for inducing
topological superconductivity. The surface Fermi level pinning in the
conduction band enables highly transparent ohmic contact without excessive
doping. We investigate electrostatically-defined quantum point contacts (QPCs)
in deep-well InAs 2DEGs. Despite the 3.3\% lattice mismatch between the InAs
quantum well and the InP substrate, we report clean QPCs with up to eight
pronounced quantized conductance plateaus at zero magnetic field. Source-drain
DC bias spectroscopy reveals a harmonic confinement potential with a nearly $5$
meV subband spacing. We find a many-body exchange interaction enhancement for
the out-of-plane $g$-factor $|g_{\perp}^*| = 27 \pm 1$, whereas the in-plane
$g$-factor is isotropic $|g^*_{x}| = |g^*_{y}| = 12 \pm 2$, close to the bulk
value for InAs.

21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
37
The categories of this paper are: supr-con
9
The categories of this paper are: nlin
35
The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ