Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: n-type Rashba Spin Splitting in a Bilayer Inorganic Halide Perovskite
  with External Electric Field   In this letter, we investigated the Rashba effect of the CsPbBr$_3$ bilayers
under the external electric field (EEF), with the first-principles
calculations. For the PbBr$_2$ terminated bilayer, we found that only electrons
experience the Rashba splitting under EEF, while holes do not. Such n-type
Rashba effect can be ascribed to the surface relaxation effect that reverse the
position of the top valence bands. The n-type Rashba parameter can be tuned
monotonically to the maximum of 0.88 eV $\AA$ at EEF of 1.35 V/nm at which the
sequence of top valence bands recover to the bulk style. During this process
the p-type spins will not survive in this 2D CsPbBr$_3$, that indeed hints a
new way for making advanced functional spintronic devices.

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The categories of this paper are: physics
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The categories of this paper are: math-ph
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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: atom-ph
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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: stat