137 research outputs found
Impurity states in graphene with intrinsic spin-orbit interaction
We consider the problem of electron energy states related to strongly
localized potential of a single impurity in graphene. Our model simulates the
effect of impurity atom substituting the atom of carbon, on the energy spectrum
of electrons near the Dirac point. We take into account the internal spin-orbit
interaction, which can modify the structure of electron bands at very small
neighborhood of the Dirac point, leading to the energy gap. This makes possible
the occurrence of additional impurity states in the vicinity of the gap.Comment: 10 pages, 5 figure
Robust to impurity-scattering spin Hall effect in two-dimensional electron gas
We propose a mechanism of spin Hall effect in two-dimensional electron gas
with spatially random Rashba spin-orbit interaction. The calculations based on
the Kubo formalism and kinetic equation show that in contrast to the constant
spin-orbit coupling, spin Hall conductivity in the random spin-orbit field is
not totally suppressed by the potential impurity scattering. Even if the
regular contribution is removed by the vertex corrections, the terms we
consider, remain. Therefore, the intrinsic spin-Hall effect exists being,
however, non-universal.Comment: 4+ pages, 2 figure
Erratum to: ‘The correlation between pretreatment cytokine expression patterns in peripheral blood mononuclear cells with chronic hepatitis c outcome’
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