Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electric field tunable unconventional superconductivity in alternating
  twist magic-angle trilayer graphene   We construct a van der Waals heterostructure consisting of three graphene
layers stacked with alternating twisting angles $\pm\theta$. At the average
twist angle $\theta\sim 1.56^{\circ}$, a theoretically predicted magic angle
for the formation of flat electron bands, narrow conduction and valence moir\'e
bands appear together with a linearly dispersing Dirac band. Upon doping the
half-filled moir\'e valence band with holes, or the half-filled moir\'e
conduction band with electrons, displacement field tunable superconductivity
emerges, reaching a maximum critical temperature of 2.1 K at optimal doping and
displacement field. By tuning the doping level and displacement fields, we find
that superconducting regimes occur in conjunction with flavour polarization of
moir\'e bands bounded by a van Hove singularity (vHS) at high displacement
fields. This experimental observation is found to be inconsistent with a weak
coupling description, suggesting that the observed moir\'e superconductivity
has an unconventional nature.

8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con