Bulletin of the American Physical Society
APS March Meeting 2011
Volume 56, Number 1
Monday–Friday, March 21–25, 2011; Dallas, Texas
Abstract: C1.00105 : Effect of spin-orbit interaction on the ballistic transport properties of nanowires
Author:
We calculated the effects of spin-orbit interaction (SOI) on the
energy bands,
ballistic conductance ($G$) and the electron-diffusion
thermoelectric power ($S_{\rm d}$)
of a nanowire by varying the temperature, electron density and
width of the wire.
We used the effective mass approximation in a model for the
quasi-1D electron system that includes a Rashba potential lateral
confinement of the 2DEG and a quasi-square potential well
confinement transverse to the 2DEG. Both terms ($\alpha$ and
$\beta$) give rise to SOI coupling which affects significantly
the band structure obtained from numerical solutions of a pair
of coupled equations. Comparing our model
with the already published work where harmonic confinement was
employed to
describe the transverse confinement, we found that the energy
bands are
different and, in addition to crossing effect of the transverse
energy bands,
there is also anticrossing for specific values of the wavevector
$k_y$ along the wire.
The $\beta$-term of the Hamiltonian causes a
displacement and a deformation of the transverse energy band
structure which is more
pronounced for large values of the wave vector.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2011.MAR.C1.105
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