Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stability, Electronic and Magnetic properties of magnetically doped
  topological insulators Bi2Se3, Bi2Te3 and Sb2Te3   Magnetic interaction with the gapless surface states in topological insulator
(TI) has been predicted to give rise to a few exotic quantum phenomena.
However, the effective magnetic doping of TI is still challenging in
experiment. Using first-principles calculations, the magnetic doping properties
(V, Cr, Mn and Fe) in three strong TIs (Bi$_{2}$Se$_{3}$, Bi$_{2}$Te$_{3}$ and
Sb$_{2}$Te$_{3}$) are investigated. We find that for all three TIs the
cation-site substitutional doping is most energetically favorable with
anion-rich environment as the optimal growth condition. Further our results
show that under the nominal doping concentration of 4%, Cr and Fe doped
Bi$_{2}$Se$_{3}$, Bi$_{2}$Te$_{3}$, and Cr doped Sb$_{2}$Te$_{3}$ remain as
insulator, while all TIs doped with V, Mn and Fe doped Sb$_{2}$Te$_{3}$ become
metal. We also show that the magnetic interaction of Cr doped Bi$_{2}$Se$_{3}$
tends to be ferromagnetic, while Fe doped Bi$_{2}$Se$_{3}$ is likely to be
antiferromagnetic. Finally, we estimate the magnetic coupling and the Curie
temperature for the promising ferromagnetic insulator (Cr doped
Bi$_{2}$Se$_{3}$) by Monte Carlo simulation. These findings may provide
important guidance for the magnetism incorporation in TIs experimentally.

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The categories of this paper are: physics
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: chem-ph