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arXiv · 1106.5432

Magnetotunnelling in resonant tunnelling structures with spin-orbit interaction

Goran Isić·Dragan Indjin·Vitomir Milanović·Jelena Radovanović·Zoran Ikonić·Paul Harrison
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Abstract

Magnetotunnelling spectroscopy of resonant tunnelling structures provides information on the nature of the two-dimensional electron gas in the well. We describe a model based on nonequilibrium Green's functions that allows for a comprehensive study of the density of states, tunnelling currents and current spin polarization. The investigated effects include the electron-phonon interaction, interface roughness scattering, Zeeman effect and the Rashba spin-orbit interaction. A qualitative agreement with experimental data is found regarding the satellite peaks. The spin polarization is predicted to be larger than ten percent for magnetic fields above 2 Tesla and having a structure even at the satellite peaks. The Rashba effect is confirmed to be observable as a beating pattern in the density of states but found to be too small to affect the tunnelling current.

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Goran Isić, Dragan Indjin, Vitomir Milanović, Jelena Radovanović, Zoran Ikonić, Paul Harrison. 2011-06-27. Magnetotunnelling in resonant tunnelling structures with spin-orbit interaction. https://doi.org/10.1063/1.3633252

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