Considering spin in the transport of nanoscale devices

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SUMMARY

The discussion focuses on the transmission of nanoscale devices and the consideration of spin polarization in simulations. It is established that spin effects can be neglected unless specific efforts are made to achieve spin polarization, such as using a ferromagnetic layer or circular polarized light irradiation. The spin diffusion length varies based on material and impurities, typically being short, which leads to a non-magnetic population averaging out to 50%. The importance of understanding these factors is crucial for accurate simulations in spintronics.

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Researchers and engineers in the fields of nanotechnology and spintronics, particularly those involved in the design and simulation of nanoscale devices.

simsCity
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Hi,

The transmission of nano devices are generally done without cosidering the spin polarization. However, as I saw in some papers, the effect of spin is sometimes included. How can I decide to use spin or not when simulationg transmission of nanoscale devices?

Thanks in advance...
 
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It takes quite some effort to produce spin polarization in nano devices. Spins get scattered and eventually average out to a 50%/50% non-magnetic population. The length scale (spin diffusion length) for this depends on the material and heavy atom impurities, but in general it is quite short.

So unless you make an effort to spin-polarize your device, e.g. by direct contact with a ferromagnetic layer or irradiation with circular polarized light you can probably neglect spin effects.

http://en.wikipedia.org/wiki/Spintronics
 
Thanks a lot.
 

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