Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Superconductivity from collective excitations in magic angle twisted
  bilayer graphene   A purely electronic mechanism is proposed for the unconventional
superconductivity recently observed in twisted bilayer graphene (tBG) close to
the magic angle. Using the Migdal-Eliashberg framework on a one parameter
effective lattice model for tBG we show that a superconducting state can be
achieved by means of collective electronic modes in tBG. We posit robust
features of the theory, including an asymmetrical superconducting dome and the
magnitude of the critical temperature that are in agreement with experiments.

7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
2
The categories of this paper are: math
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con