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

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

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

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arxiv cond-mat/0510322 v1 pith:PXERGM6P submitted 2005-10-12 cond-mat.mes-hall

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 This is my paper

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keywords splittingquantumzeemanacceptorfieldlevelsmagneticwell

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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.

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

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