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 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.
- Received 26 October 2012
DOI:https://doi.org/10.1103/PhysRevLett.110.057402
© 2013 American Physical Society
Synopsis
X Rays with a Berry Twist
Published 28 January 2013
In a crystal with an undulating lattice deformation, geometric phase-shift effects allow better control of x-ray propagation.
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