Journal
PHYSICAL REVIEW B
Volume 70, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.70.115313
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Coherent Rashba spin precession along interacting multimode quantum channels is investigated, revisiting the theory of coupled Tomonaga-Luttinger liquids. We identify susceptibilities as the key parameters to govern exponents and Rashba precession lengths. In semiconducting quantum wires spins of different transport channels are found to dephase in their respective precession angles with respect to one another, as a result of the interaction. This could explain the experimental difficulty to realize the Datta Das transistor. In single walled carbon nanotubes, on the other hand, interactions are predicted to suppress dephasing between the two flavor modes at small doping.
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