Grazing‐angle reflectivity setup for the low‐temperature infrared spectroscopy of two‐dimensional systems. (11th September 2019)

• Record Type: Journal Article
• Authors: Verseils, Marine; Voute, Alexandre; Langerome, Benjamin; Deutsch, Maxime; Brubach, Jean-Blaise; Kalaboukhov, Alexei; Nucara, Alessandro; Calvani, Paolo; Roy, Pascale
• Is Part Of: Journal of synchrotron radiation. Volume 26:Part 6(2019)
• Page Start: 1945
• Page End: 1950
• Publication Date: 2019-09-11
• Subjects: infrared -- grazing‐angle reflectivity -- low‐temperature -- two‐dimensional systems; Synchrotron radiation -- Periodicals; Free electron lasers -- Periodicals; 539.73505
• DOI: 10.1107/S1600577519010920
• Languages: English
• ISSNs: 0909-0495

Abstract

Abstract : A new apparatus has been developed for grazing‐incidence infrared reflectivity measurements at temperatures down to 7 K. The setup is adapted for studying adsorbed molecules on surfaces or ultrathin electron layers that form at the interface of two insulators. Abstract : 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.