For 3D Dirac fermions at charge neutrality the diffusion constant is purely quantum geometric in origin because the band velocity contribution cancels exactly, unlike in 2D.
Mitscherling, Longitudinal and anomalous hall conduc- tivity of a general two-band model, Phys
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Persistent spin textures isolate spin-rotation quantum geometry in nonlinear magnetotransport, yielding direction-independent responses as a distinctive signature even with symmetry-breaking terms.
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Quantum geometric contribution to the diffusion constant
For 3D Dirac fermions at charge neutrality the diffusion constant is purely quantum geometric in origin because the band velocity contribution cancels exactly, unlike in 2D.
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Probing persistent spin textures through nonlinear magnetotransport
Persistent spin textures isolate spin-rotation quantum geometry in nonlinear magnetotransport, yielding direction-independent responses as a distinctive signature even with symmetry-breaking terms.