Skew scattering and its proportional behaviour to conductivity

Click For Summary
SUMMARY

The discussion centers on the skew scattering effect related to the spin Hall effect, specifically its behavior in relation to conductivity and impurities. It is established that skew scattering is more pronounced in cleaner materials due to its dependence on the momentum relaxation time, which inversely correlates with scattering events. The confusion arises from the expectation that increased impurities would enhance skew scattering, contrary to the observed phenomenon. Key references include Hoffmann's 2013 paper on the spin Hall effect in metals, which provides foundational insights into this topic.

PREREQUISITES
  • Understanding of the spin Hall effect
  • Familiarity with skew scattering mechanisms
  • Knowledge of momentum relaxation time in electron transport
  • Basic grasp of solid-state physics concepts
NEXT STEPS
  • Read Hoffmann's 2013 paper on the spin Hall effect in metals
  • Explore the relationship between momentum relaxation time and electron scattering
  • Investigate the intrinsic contributions to spin currents in materials
  • Study the effects of impurities on electron transport properties
USEFUL FOR

Physicists, materials scientists, and researchers focusing on spintronics and electron transport phenomena will benefit from this discussion.

JanSpintronics
Messages
31
Reaction score
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?
 
Physics news on Phys.org
Does nobody can help me with that?
 
There are some things that could help your chances of getting a response. First, try to improve your grammar and punctuation. Second, you could put up any equations or variables you are talking about using LaTeX. Third, upload the paper with a reference to the equation number or figure or whatever. In essence, make it easier for people to help you.
 

Similar threads

Graduate Carrier relaxation within a quantum well
  • · Replies 4 ·
Replies
4
Views
3K
Graduate Scattering states at presence of interface with strong SOC
  • · Replies 1 ·
Replies
1
Views
2K
Undergrad Thomson Scattering when low-intensity light meets an orbital electron
  • · Replies 5 ·
Replies
5
Views
2K
Graduate Bulk and Slab electronic structure differences
  • · Replies 6 ·
Replies
6
Views
3K
Graduate Why is the spin orientation crucial in the Kondo effect?
  • · Replies 4 ·
Replies
4
Views
2K
Graduate Classical Predictions of Scattered Radiation
  • · Replies 5 ·
Replies
5
Views
1K
Graduate What do you mean by Cooper pair in real space and k space?
  • · Replies 1 ·
Replies
1
Views
2K
Graduate Trying to understand quantum-mechanical conduction
  • · Replies 14 ·
Replies
14
Views
5K
Graduate Mass dependent multiple scattering
  • · Replies 9 ·
Replies
9
Views
2K
Undergrad Donor Impurities and the Forbidden region
  • · Replies 4 ·
Replies
4
Views
2K