Controlling the propagation of x-ray waves inside a heteroepitaxial crystal containing quantum dots using Berry's phase

We study a new aspect of the Berry-phase effect as the collaborative x-ray translation by a crystal with undulated deformation. The macroscopic translation was observed around the interface of a heteroepitaxial crystal deformed by quantum dots of 4.1 germanium monolayers on a silicon substrate. The...

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Bibliographic Details
Published inPhysical review letters Vol. 110; no. 5; p. 057402
Main Authors Kohmura, Yoshiki, Sawada, Kei, Fukatsu, Susumu, Ishikawa, Tetsuya
Format Journal Article
LanguageEnglish
Published United States 28.01.2013
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Summary:We study a new aspect of the Berry-phase effect as the collaborative x-ray translation by a crystal with undulated deformation. The macroscopic translation was observed around the interface of a heteroepitaxial crystal deformed by quantum dots of 4.1 germanium monolayers on a silicon substrate. The quantum dots formed a large local gradient of deformation at the interface, which triggered the x-ray translation into two directions. This effect provides a new probe for investigating the interfacial strain, and leads to a single-crystal beam splitter with parallel exit beams.
ISSN:1079-7114
DOI:10.1103/physrevlett.110.057402