Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Coexistence of Ferromagnetism and Topology by Charge Carrier Engineering
  in intrinsic magnetic topological insulator MnBi4Te7   Intrinsic magnetic topological insulators (MTIs) MnBi2Te4 and
MnBi2Te4/(Bi2Te3)n are expected to realize the high-temperature quantum
anomalous Hall effect (QAHE) and dissipationless electrical transport.
Extensive efforts have been made on this field but there is still lack of ideal
MTI candidate with magnetic ordering of ferromagnetic (FM) ground state. Here,
we demonstrate a MTI sample of Mn(Bi0.7Sb0.3)4Te7 which holds the coexistence
of FM ground state and topological non-triviality. The dramatic modulation of
the magnetism is induced by a charge carrier engineering process by the way of
Sb substitution in MnBi4Te7 matrix with AFM ordering. The evolution of
magnetism in Mn(Bi1-xSbx)4Te7 is systematically investigated by magnetic
measurements and theoretical calculations. The clear topological surface states
of the FM sample of x = 0.3 are also verified by angle-resolved photoemission
spectra. We also aware that the FM sample of x = 0.3 is close to the charge
neutral point. Therefore, the demonstration of intrinsic FM-MTI of
Mn(Bi0.7Sb0.3)4Te7 in this work sheds light to the further studies of QAHE
realization and optimizations.

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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: dg-ga
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The categories of this paper are: q-alg
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th