Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Spin-Hall effect in a dirty Rashba semiconductor   The impact of the boundary condition on the solution of the spin diffusion
equations in a dirty Rashba semiconductor is reinvestigated. To this end
diffusion equations, which take into account the coupling between spin and
charge, are derived. The investigation of the solution to the spin diffusion
equations near the boundary shows that the spin-current tensor vanishes
discontinuously at the boundary. As a consequence, there is non spin-Hall
effect in a dirty Rashba semiconductor.

31
The categories of this paper are: ao-sci
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The categories of this paper are: acc-phys
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex