Valley-dependent current generation in nanotubes by twisted light | Zendy

Xiaoning Zang | Zendy; Nirpendra Singh | Zendy; Udo Schwingenschlögl | Zendy

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Valley-dependent current generation in nanotubes by twisted light

Author(s) -

Xiaoning Zang,

Nirpendra Singh,

Udo Schwingenschlögl

Publication year - 2018

Publication title -

physical review. b./physical review. b

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.78

H-Index - 465

eISSN - 2469-9969

pISSN - 2469-9950

DOI - 10.1103/physrevb.98.085401

Subject(s) - semiclassical physics , physics , electron , angular momentum , condensed matter physics , magnetic field , electric field , polarization (electrochemistry) , nanotube , equations of motion , electric current , orbital motion , current (fluid) , crystal (programming language) , carbon nanotube , quantum electrodynamics , classical mechanics , quantum mechanics , quantum , materials science , nanotechnology , chemistry , computer science , thermodynamics , programming language

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.

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