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Spin-Charge Locking and Tunneling into a Helical Metal

URN to cite this document:
Schwab, Peter ; Raimondi, Roberto ; Gorini, Cosimo
Date of publication of this fulltext: 09 Jan 2015 12:51


We derive a kinetic equation for the electrons moving on the surface of a threedimensional topological insulator. Due to the helical nature of the excitations backward scattering is suppressed in the collision integral, and the spin dynamics is entirely constrained by that of the charge. We further analyze the tunneling between the helical metal and a conventional metal or ferromagnet. We find ...


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