Bulk inversion asymmetry in zinc-blende crystals creates cubic k-dependent spin splitting — distinct spin texture from Rashba
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H_D = β(kx·σx − ky·σy) [linear] + γ(kx·ky²·σx − ky·kx²·σy) [cubic] — Dresselhaus SOC arises from the T_d point group of zinc-blende semiconductors (GaAs, InAs). The spin texture rotates oppositely to Rashba.