Weak Anti Localisation concept

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SUMMARY

The discussion centers on the concept of Weak Anti Localisation (WAL) in systems exhibiting spin-orbit coupling. Participants highlight the lack of comprehensive resources explaining WAL, particularly in relation to its effects on resistivity due to destructive interference of spin paths. The reference to Hikami et al.'s 1980 paper provides a foundational understanding of the spin-orbit interaction and its implications for magnetoresistance in two-dimensional systems.

PREREQUISITES
  • Understanding of spin-orbit coupling in quantum mechanics
  • Familiarity with the principles of magnetoresistance
  • Knowledge of two-dimensional electron systems
  • Ability to interpret academic papers in condensed matter physics
NEXT STEPS
  • Research the implications of Weak Anti Localisation on electronic transport properties
  • Study the mathematical framework of spin-orbit coupling
  • Explore experimental techniques for measuring magnetoresistance in two-dimensional systems
  • Review the original paper by Hikami, S.; A. I Larkin, Y. Nagaoka (1980) for deeper insights
USEFUL FOR

Physicists, materials scientists, and students studying quantum mechanics or condensed matter physics, particularly those interested in spintronics and electronic properties of materials.

StJoris
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Hi all,

For my studies I'm currently looking into Weak anti localisation.
I've come across a lot of articles making use of this effect, but none of them describe the concept of WAL.
So far I've been unable to find it in my books. I hope one of you can help me with this.
 
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Abstracted from Wikipedia,

"In a system with spin-orbit coupling the spin of a carrier is coupled to its momentum. The spin of the carrier rotates as it goes around a self-intersecting path, and the direction of this rotation is opposite for the two directions about the loop. Because of this, the two paths any loop interfere destructively which leads to a lower net resistivity"

Please refer to Hikami, S.; A. I Larkin, Y. Nagaoka (1980). "Spin–Orbit Interaction and Magnetoresistance in the Two-Dimensional Random System". Progress of Theoretical Physics 63 (2): 707–710
 

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