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Giant anisotropy of Zeeman splitting of quantum confined acceptors in Si/Ge

K. -M. Haendel·R. Winkler·U. Denker·O. G. Schmidt·R. -J. Haug
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Abstract

Shallow acceptor levels in Si/Ge/Si quantum well heterostructures are characterized by resonant tunneling spectroscopy in the presence of high magnetic fields. In a perpendicular magnetic field we observe a linear Zeeman splitting of the acceptor levels. In an in-plane field, on the other hand, the Zeeman splitting is strongly suppressed. This anisotropic Zeeman splitting is shown to be a consequence of the huge light hole-heavy hole splitting caused by a large biaxial strain and a strong quantum confinement in the Ge quantum well.

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K. -M. Haendel, R. Winkler, U. Denker, O. G. Schmidt, R. -J. Haug. 2005-10-12. Giant anisotropy of Zeeman splitting of quantum confined acceptors in Si/Ge. https://doi.org/10.1103/physrevlett.96.086403

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