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We report a study of suppressed spin dephasing for quasi-one-dimensionalelectron ensembles in wires etched into a GaAs/AlGaAs heterojunction system.Time-resolved Kerr-rotation measurements show a suppression that is mostpronounced for wires along the [110] crystal direction. This is the fingerprintof a suppression that is enhanced due to a strong anisotropy in spin-orbitfields that can occur when the Rashba and Dresselhaus contributions areengineered to cancel each other. A surprising observation is that thismechanisms for suppressing spin dephasing is not only effective for electronsin the heterojunction quantum well, but also for electrons in a deeper bulklayer.

Suppressed spin dephasing for 2D and bulk electrons in GaAs wires due to engineered cancellation of spin-orbit interaction terms