Nonlocal voltage in a spin field effect transistor with finite channel width
- Nonlocal voltage in a spin field effect transistor with finite channel width
- 엄종화; 구현철; 장준연; 한석희
- Spin field effect transistor; Spin-orbit interaction; channel width; nonlocal voltage; Rashba spin splitting
- Issue Date
- Current applied physics
- VOL 11, NO 3, 276-279
- Spin transport in the two-dimensional electron gas with strong spin-orbit interaction is examined by
using a simple phenomenological simulation. The large spin-orbit interaction and the randomized
electron trajectory due to the impurity scattering make the nonlocal voltage of a spin field effect transistor
undetectable in the diffusive regime. However, the spin-precessional phase accumulates coherently
in the ballistic regime and the nonlocal voltage is given by a function of spin-orbit interaction
parameter. If the distance between injector and detector is comparable to the mean free path, a sinusoidal
oscillation of nonlocal voltage is restored even for a wide channel.
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