Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spin diffusion in p-type bilayer WSe$_2$   We investigate the steady-state out-of-plane spin diffusion in p-type bilayer
WSe2 in the presence of the Rashba spin-orbit coupling and Hartree-Fock
effective magnetic field. The out-of-plane components of the Rashba spin-orbit
coupling serve as the opposite Zeeman-like fields in the two valleys. Together
with the identical Hartree-Fock effective magnetic fields, different total
effective magnetic field strengths in the two valleys are obtained. It is
further revealed that due to the valley-dependent total effective magnetic
field strength, similar (different) spin-diffusion lengths in the two valleys
are observed at small (large) spin injection. Nevertheless, it is shown that
the intervalley hole-phonon scattering can suppress the difference in the
spin-diffusion lengths at large spin injection due to the spin-conserving
intervalley charge transfers with the opposite transfer directions between
spin-up and -down holes. Moreover, with a fixed large pure spin injection, we
predict the build-up of a steady-state valley polarization during the spin
diffusion with the maximum along the diffusion direction being capable of
exceeding 1 %. It is revealed that the valley polarization arises from the
induced quasi hot-hole Fermi distributions with different effective hot-hole
temperatures between spin-up and -down holes during the spin diffusion, leading
to the different intervalley charge transfer rates in the opposite transfer
directions. Additionally, it is also shown that by increasing the injected spin
polarization, the hole density or the impurity density, the larger valley
polarization can be obtained.

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The categories of this paper are: econ
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: acc-phys
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The categories of this paper are: physics
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int