Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: In-Plane Magnetization Induced Quantum Anomalous Hall Effect in Atomic
  Crystals of Group-V Elements   We theoretically demonstrate that the in-plane magnetization induced quantum
anomalous Hall effect (QAHE) can be realized in atomic crystal layers of
group-V elements with buckled honeycomb lattice. We first construct a general
tight-binding Hamiltonian with $sp^3$ orbitals via Slater-Koster two-center
approximation, and then numerically show that for weak and strong spin-orbit
couplings the systems harbor QAHEs with Chern numbers of $\mathcal{C}=\pm1$ and
$\pm2$ , respectively. For the $\mathcal{C}=\pm1$ phases, we find the critical
phase-transition magnetization from a trivial insulator to QAHE can become
extremely small by tuning the spin-orbit coupling strength. Although the
resulting band gap is small, it can be remarkably enhanced by orders via
tilting the magnetization slightly away from the in-plane orientation. For the
$\mathcal{C}=\pm2$ phases, we find that the band gap is large enough for the
room-temperature observation. Although the critical magnetization is relatively
large, it can be effectively decreased by applying a strain. All these suggest
that it is experimentally feasible to realize high-temperature QAHE from
in-plane magnetization in atomic crystal layers of group-V elements.

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The categories of this paper are: econ
1
The categories of this paper are: cs
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-th
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: q-fin