title: Surface acoustic BLOCH oscillations, the Wannier-Stark ladder, and Landau-Zener tunneling in a solid.
abstract: We present the experimental observation of Bloch oscillations, the Wannier-Stark ladder, and Landau-Zener tunneling of surface acoustic waves in perturbed grating structures on a solid substrate. A model providing a quantitative description of our experimental observations, including multiple Landau-Zener transitions of the anticrossed surface acoustic Wannier-Stark states, is developed. The use of a planar geometry for the realization of the Bloch oscillations and Landau-Zener tunneling allows a direct access to the elastic field distribution. The vertical surface displacement has been measured by interferometry.
authors.affiliation: Materials Science Institute, University of Valencia, PO Box 22085, ES46071 Valencia, Spain. mmlimajr@uv.es
authors.forename: M M
authors.initials: MM
authors.lastname: de Lima
authors.forename: Yu A
authors.initials: YA
authors.lastname: Kosevich
authors.forename: P V
authors.initials: PV
authors.lastname: Santos
authors.forename: A
authors.initials: A
authors.lastname: Cantarero