Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Inducing anisotropies in Dirac fermions by periodic driving   We consider the three-dimensional Hamiltonian for Bi$_2$Se$_3$, a
second-generation topological insulator, under the effect of a periodic drive
for both in-plane and out-of-plane fields. As it will be shown by means of
high-frequency expansions up to second order in the Floquet Hamiltonian, the
driving induces anisotropies in the Dirac cone and opens up a quasienergy gap
for in-plane elliptically polarized fields. Analytic expressions are obtained
for the renormalized velocities and the quasienergy gap. These expressions are
then compared to numerical calculations performed by discretizing the
Hamiltonian in a one-dimensional lattice and following a staggered fermion
approach, achieving a remarkable agreement. We believe our work may have an
impact on the transport properties of topological insulators.

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The categories of this paper are: q-fin
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The categories of this paper are: stat
34
The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: nlin
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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: eess
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The categories of this paper are: hep-th
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: acc-phys