Oxygen phonon branches inYBa2Cu3O7

Oxygen Phonon Branches in Detwinned YBa2Cu3O7

Forschungszentrum Karlsruhe, Institut für Festkörperphysik, Postfach 3640, D-76021 Karlsruhe, Germany Laboratoire Leon Brillouin, C.E.A./C.N.R.S., F-91191-Gif-sur-Yvette CEDEX, France Institute for Material Research, Tohoku University, Katahira, Aoba-ku, Sendai, 9808577, Japan Physics Department, Brookhaven National Laboratory, Upton, NY 11973 Superconductivity Research Laboratory, ISTEC, Shino...

Direct observation of confined acoustic phonon polarization branches in free-standing semiconductor nanowires

Similar to electron waves, the phonon states in semiconductors can undergo changes induced by external boundaries. However, despite strong scientific and practical importance, conclusive experimental evidence of confined acoustic phonon polarization branches in individual free-standing nanostructures is lacking. Here we report results of Brillouin-Mandelstam light scattering spectroscopy, which...

Oxygen Vacancy Induced Flat Phonon Mode at FeSe /SrTiO3 interface

A high-frequency optical phonon mode of SrTiO3 (STO) was found to assist the high-temperature superconductivity observed recently at the interface between monolayer FeSe and STO substrate. However, the origin of this mode is not clear. Through first-principles calculations, we find that there is a novel polar phonon mode on the surface layers of the STO substrate, which does not exist in the ST...

v 2 [ co nd - m at . s up r - co n ] 1 6 Se p 20 02 Oxygen Phonon Branches in Detwinned YBa

No. of Branches No. of Branches

This paper gives an overview of promising new developments in robust stability and performance analysis of linear control systems with real parametric uncertainty. The goal is to develop a practical algorithm for medium size problems, where medium size means less than 100 real parameters, and \practical" means avoiding combinatoric (nonpolynomial) growth in computation with the number of parame...