Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Longitudinal and spin-Hall conductance of a two-dimensional Rashba
  system with arbitrary disorder   We calculate the longitudinal and spin-Hall conductances in four-lead bridges
with Rashba - Dresselhaus spin-orbit interactions. Numerical results are
obtained both within Landauer-Buttiker formalism and by the direct evaluation
of the Kubo formula. The microscopic Hamiltonian is obtained in the
tight-binding approximation in terms of the neareast-neighbor hopping integral
$t$, the Rashba spin-orbit coupling $V_R$, the Dresselhaus spin-orbit coupling
$V_D$ and an Anderson-like, on-site disorder energy strength $W$. We reconfirm
that below a critical disorder threshold, the spin-Hall effect is present.
Further, we study the effect on the two conductivities of the Fermi energy,
Rashba/Dresselhaus coefficient ratio, and system size.

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The categories of this paper are: hep-ph
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
20
The categories of this paper are: acc-phys
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
37
The categories of this paper are: supr-con
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio