Orbital momentum Hall effect in p-doped graphane

Details Orbital momentum Hall effect in p-doped graphane Orbital momentum Hall effect in p-doped graphane

2010-04-05

arxiv.org/abs/1004.0624v2

Phys. Rev. B 82, 161404 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

RevTeX 4, 4 pages, 2 figures, final version

Scientific paper

10.1103/PhysRevB.82.161404

It is shown that an electric field applied to p-doped graphane generates a dissipationless orbital momentum Hall current. In the clean limit the corresponding Hall conductivity is independent of the concentration of holes. The Hall effect is related to the $2\pi$-Berry phase accumulated when heavy and light holes are transported around the degeneracy point in the center of the Brillouin zone. This also leads to the orbital momentum edge currents in the equilibrium state, and to the accumulation of the orbital momentum at the edges when the system is driven out of equilibrium.

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