Valley-dependent current generation in nanotubes by twisted light

Xiaoning Zang, Nirpendra Singh, Udo Schwingenschlögl

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Each electronic band of a nanotube is associated with a specific crystal orbital angular momentum, in analogy to crystal momentum. We develop the semiclassical equations of motion of electrons in such twisted Bloch bands perturbed by electric and magnetic fields. These equations demonstrate that the absorption of twisted light generates valley-dependent current along the nanotube in the presence of an external inhomogeneous magnetic field. We show that the valley-dependent current provides a venue to detect valley polarization in twisted Bloch bands.

Original languageBritish English
Article number085401
JournalPhysical Review B
Issue number8
StatePublished - 1 Aug 2018


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