Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Re-entrant magic-angle phenomena in twisted bilayer graphene in integer
  magnetic fluxes   In this work we address the re-entrance of magic-angle phenomena (band
flatness and quantum-geometric transport) in twisted bilayer graphene (TBG)
subjected to strong magnetic fluxes $\pm \Phi_0$, $\pm 2 \Phi_0$, $\pm 3
\Phi_0$... ($\Phi_0 = h/e$ is the flux quantum per moir\'e cell). The moir\'e
translation invariance is restored at the integer fluxes, for which we
calculate the TBG band structure using accurate atomistic models with lattice
relaxations. Similarly to the zero-flux physics outside the magic angle
condition, the reported effect breaks down rapidly with the twist. We conclude
that the magic-angle physics re-emerges in high magnetic fields, witnessed by
the appearance of flat electronic bands distinct from Landau levels, and
manifesting non-trivial quantum geometry. We further discuss the possible
flat-band quantum geometric contribution to the superfluid weight in strong
magnetic fields (28 T at 1.08$^\circ$ twist), according to Peotta-T\"{o}rm\"{a}
mechanism.

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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
6
The categories of this paper are: astro-ph
26
The categories of this paper are: bayes-an