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We theoretically investigate spin current and magnetic response induced bythe twisting phonon mode in carbon nanotubes via the spin-rotation coupling. Aneffective magnetic field due to the twisting mode induces both spin and orbitalmagnetizations. The induced spin and orbital magnetizations have both radialand axial components. We show that ac pure spin current is generated by thetwisting phonon mode. The magnitude of the spin current and orbitalmagnetization for a (10,10) armchair nanotube is estimated as an example. Wefind that the ac pure spin current is detectable in magnitude when thefrequency of the twisting mode is of the order of GHz, and that the orbitalmagnetization is found to be larger than the spin magnetization.

Spin current generation and magnetic response in carbon nanotubes by the twisting phonon mode