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

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

2005-10-12

arxiv.org/abs/cond-mat/0510322v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

5 figures, 4 pages

Scientific paper

10.1103/PhysRevLett.96.086403

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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