Seminar in SMMEE: Structure, Chemistry and Interface of Epitaxial Systems

Title: Structure, Chemistry and Interface of Epitaxial Systems
Speaker: Dr. Sriram Venkatesan
Location: L3
Date: 13-Mar-2013 (Wed)
Time: 2:25pm - 3:15pm

Abstract:

Epitaxial systems are of much interest in scientific as well as their technologically potential applications in micro/nano electronics including, nonvolatile memories and micro electro mechanical systems. In my talk I will be discussing on epitaxially grown thin films and nanowires. The thin film ferroelectric/multiferroic perovskite structures are strongly affected by the epitaxial strain. The intrinsic coupling between strain and polarization by the substrate clamping effect can be used to tune the electronic properties of complex oxide films to enhance functional properties. Epitaxial functional oxide thin film with a key focus on multiferroic TbMnO3 films grown on SrTiO3 substrate will be presented in detail. On the nanowire part, I will present our recent understanding on the junctions in axial III-V heterostructure nanowires obtained via an interchange of group III elements. In both the systems, I will be talking on the structure, chemistry and interface at an atomic scale obtained using a conventional and advanced analytical Transmission Electron Microscopy (TEM) techniques.