National Synchrotron Light Source Seminar

"Imaging thin films with subatomic resolution"

Presented by Yizhak Yacoby, Hebrew University

Tuesday, November 20, 2007, 11:00 am — Seminar Room, Bldg. 725

Abstract:
A recently developed method to determine the atomic structure of thin films and their interface with the substrate will be discussed. The method known as Coherent Bragg Rod Analysis (COBRA) consists of measuring the diffraction intensities along the system Bragg rods, analyzing the results to determine the complex scattering factors which are then Fourier transformed into real space to determine the system electron density. The principles underlying the method will be briefly discussed and the method will be illustrated with three examples.
1. Ferroelectric thin films and the problem of depolarizing electric fields.
2. The effect of electrodes on the structure of thin films.
3. The formation of 2D electron gas at the interface of LaAlO3/SrTiO3

Hosted by: Ron Pindak

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