Ratio between the global spin relaxation rate minimum and the rate at vanishing wave vectors of spin density in zinc-blende-type 2DEGs as a function of Miller indices. White regions indicate persistent spin helix solutions.
From the article:
Control of Spin Helix Symmetry in Semiconductor Quantum Wells by Crystal OrientationMichael Kammermeier, Paul Wenk, and John Schliemann
Phys. Rev. Lett. 117, 236801 (2016)
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