Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Charge-spin interconversion in graphene-based systems from density
  functional theory   We present a methodology to address, from first principles, charge-spin
interconversion in two-dimensional materials with spin-orbit coupling. Our
study relies on an implementation of density functional theory based quantum
transport formalism adapted to such purpose. We show how an analysis of the
$k$-resolved spin polarization gives the necessary insight to understand the
different charge-spin interconversion mechanisms. We have tested it in the
simplest scenario of isolated graphene in a perpendicular electric field where
effective tight-binding models are available to compare with. Our results show
that the flow of an unpolarized current across a single layer of graphene
produces, as expected, a spin separation perpendicular to the current for two
of the three spin components (out-of-plane and longitudinal), which is the
signature of the spin Hall effect. Additionally, it also yields an overall spin
accumulation for the third spin component (perpendicular to the current), which
is the signature of the Rashba-Edelstein effect. Even in this simple example,
our results reveal an unexpected competition between the Rashba and the
intrinsic spin-orbit coupling. Remarkably, the sign of the accumulated spin
density does not depend on the electron or hole nature of the injected current
for realistic values of the Rashba coupling.

8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
30
The categories of this paper are: q-alg
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio