Complex strain distribution in individual facetted InGaN/GaN nano-columnar heterostructures

Ultrafast strain engineering in complex oxide heterostructures.

We report on ultrafast optical experiments in which femtosecond midinfrared radiation is used to excite the lattice of complex oxide heterostructures. By tuning the excitation energy to a vibrational mode of the substrate, a long-lived five-order-of-magnitude increase of the electrical conductivity of NdNiO(3) epitaxial thin films is observed as a structural distortion propagates across the int...

Plasma Synthesis of Facetted Nickel nano-Ferrites with Controlled Stoichiometry

Coaxial GaN/InGaN/GaN Nano-Heterostructures

The optimization of the epitaxial quality and ordering of coaxial GaN/InGaN/GaN nanoheterostructures is the main focus of this study. Two approaches for the realization of upright ZnO nanipillars, used as templates for the epitaxially grown GaN layers, with their respective degrees of pattern arrangement are introduced. Consequently, the growth of coaxial GaN/InGaN/GaN quantum wells (for three ...

Strain relaxation in InAs/GaSb heterostructures

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Complex functional oxide heterostructures

This article presents a review of some salient aspects of a broad class of functional materials, namely complex oxides. These materials, exemplified by the rare earth manganites, superconducting cuprates and more recently multiferroics, are characterized by a complex crystal chemistry, that is central to competing/ cooperating spin, charge, orbital and lattice degrees of freedom. In addition to...