JanSpintronics
- 31
- 2
Hallo guys,Im kinda confused about something and hope you can help me. Let me introduce you to it.
we take a look on one Mechanismen to the spin hall effect, skew scattering effect. i just read that you can see this contribution only in the clean Limit. So that's really strange for me cause the skew scattering should be stronger if you have more impurities, so why it is stronger if you have a cleaner material?
That whole Argumentation is based on the Thing that the skew scattering is proportional to the so called Momentum Relaxation time. Thats the Point which doesn't make sense to me because the time tells you Long it will take when an electron will get scatter. For skew scattering it should be invers proportional to it cause if your electrons Momentum Relaxation time is Shorter, you get more scattering. And therefore more contribution to a spin current.
You can read it in several papers, especially in Hoffmann-2013-Spin hall effect in Metals. I really have no physical Picture why the skew scattering mechanism is behave like that but maybe you.
Ist also the same strange Thing with the intrinsic contribution which is strong in the unclean Regime of an regarded material. Why isn't here the skew scattering the stronger one?
we take a look on one Mechanismen to the spin hall effect, skew scattering effect. i just read that you can see this contribution only in the clean Limit. So that's really strange for me cause the skew scattering should be stronger if you have more impurities, so why it is stronger if you have a cleaner material?
That whole Argumentation is based on the Thing that the skew scattering is proportional to the so called Momentum Relaxation time. Thats the Point which doesn't make sense to me because the time tells you Long it will take when an electron will get scatter. For skew scattering it should be invers proportional to it cause if your electrons Momentum Relaxation time is Shorter, you get more scattering. And therefore more contribution to a spin current.
You can read it in several papers, especially in Hoffmann-2013-Spin hall effect in Metals. I really have no physical Picture why the skew scattering mechanism is behave like that but maybe you.
Ist also the same strange Thing with the intrinsic contribution which is strong in the unclean Regime of an regarded material. Why isn't here the skew scattering the stronger one?