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Metastable shallow donor states of n-GaAs in a magnetic field

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Wagner, H. P. ; Prettl, Wilhelm
Date of publication of this fulltext: 18 Oct 2010 12:06


The photothermal spectrum of shallow donors in n-GaAs has been investigated at various magnetic field strengths up to 4T at different temperatures between 1.4 and 12K. Weak spectral structures observed at frequencies above the dominant 1s → 2p +1 line are attributed to optical excitations into metastable states which arise in a magnetic field. The final states of these transitions can be unambigously assigned by using high field quantum numbers.

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