Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of the inter-subband spin-orbit interaction on the spin
  transistor operation   We consider the electron transport in the Datta-Das spin transistor within
the two-subband model taking into account the intra- and inter-subband
spin-orbit (SO) interaction and study the influence of the inter-subband SO
coupling on the spin-transistor operation. Starting from the model, in which
the SO coupling constants are treated as parameters, we show that the
inter-subband SO interaction strongly affects the ordinary conductance
oscillations predicted for the transistor with the single occupancy.
Interestingly, we find that even in the absence of the intra-subband SO
interaction, the conductance oscillates as a function of the inter-subband SO
coupling constant. This phenomenon is explained as resulting from the
inter-subband transition with spin-flip. Next, we consider the realistic spin
transistor model based on the gated
Al$_{0.48}$In$_{0.52}$As/Ga$_{0.47}$In$_{0.53}$As double quantum well, for
which the SO coupling constants are determined by the Schr\"{o}dinger-Poisson
approach. We show that the SO coupling constants rapidly change around $V_g=0$,
which is desirable for the spin transistor operation. We demonstrate that for
high electron densities the inter-subband SO interaction starts to play the
dominant role. The strong evidence of this interaction is the reduction of the
conductance for gate voltage $V_g=0$, which leads to the reduction of the
on/off conductance ratio.

26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc