Grazing-angle reflectivity setup for the low-temperature infrared spectroscopy of two-dimensional systems

A new optical setup is described that allows the reflectivity at grazing incidence to be measured, including ultrathin films and two-dimensional electron systems (2DES) down to liquid-helium temperatures, by exploiting the Berreman effect and the high brilliance of infrared synchrotron radiation. This apparatus is well adapted to detect the absorption of a 2DES of nanometric thickness, namely that which forms spontaneously at the interface between a thin film of LaAlO3 and its SrTiO3 substrate, and to determine its Drude parameters.

Source: Journal of Synchrotron Radiation - September 10, 2019 Category: Physics Authors: Verseils, M. Voute, A. Langerome, B. Deutsch, M. Brubach, J.-B. Kalaboukhov, A. Nucara, A. Calvani, P. Roy, P. Tags: infrared grazing-angle reflectivity low-temperature two-dimensional systems research papers Source Type: research