title: Controlling the propagation of x-ray waves inside a heteroepitaxial crystal containing quantum dots using Berry's phase.
abstract: 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.
authors: RIKEN SPring-8 Center, 1-1-1, Kouto, Sayo-gun, Hyogo 679-5148, Japan.
authors: Yoshiki
authors: Y
authors: Kohmura
authors: Kei
authors: K
authors: Sawada
authors: Susumu
authors: S
authors: Fukatsu
authors: Tetsuya
authors: T
authors: Ishikawa