Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Topological electronic structure and intrinsic magnetization in
  MnBi$_4$Te$_7$: a Bi$_2$Te$_3$-derivative with a periodic Mn sublattice   Combinations of non-trivial band topology and long-range magnetic order hold
promise for realizations of novel spintronic phenomena, such as the quantum
anomalous Hall effect and the topological magnetoelectric effect. Following
theoretical advances material candidates are emerging. Yet, a compound with a
band-inverted electronic structure and an intrinsic net magnetization remains
unrealized. MnBi$_2$Te$_4$ is a candidate for the first antiferromagnetic
topological insulator and the progenitor of a modular
(Bi$_2$Te$_3$)$_n$(MnBi$_2$Te$_4$) series. For $n$ = 1, we confirm a
non-stoichiometric composition proximate to MnBi$_4$Te$_7$ and establish an
antiferromagnetic state below 13 K followed by a state with net magnetization
and ferromagnetic-like hysteresis below 5 K. Angle-resolved photoemission
experiments and density-functional calculations reveal a topological surface
state on the MnBi$_4$Te$_7$(0001) surface, analogous to the non-magnetic parent
compound Bi$_2$Te$_3$. Our results render MnBi$_4$Te$_7$ as a band-inverted
material with an intrinsic net magnetization and a complex magnetic phase
diagram providing a versatile platform for the realization of different
topological phases.

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The categories of this paper are: nlin
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
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The categories of this paper are: eess
30
The categories of this paper are: q-alg
36
The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: stat