Electronic structure and optical properties of short-period α-SnnGem superlattices

Vogl, P., Olajos, Janos, Wegscheider, Werner and Abstreiter, Gerhard (1992) Electronic structure and optical properties of short-period α-SnnGem superlattices. Surface Science 267 (1-3), pp. 83-86.

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Abstract

Short period α-Sn/Ge strained layer superlattices have been prepared on Ge(001) substrates by low temperature molecular beam epitaxy. We have achieved almost defect free and thermally stable single crystalline structures. Photourrent measurements in a series of Sn1Gem(m>10) superlattices reveal a shift of the fundamental energy gap to smaller energies with decreasing Ge layer thickness m, in good ...

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