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.
Grazing-angle reflectivity setup for the low-temperature infrared spectroscopy of two-dimensional systems / Verseils, M.; Voute, A.; Langerome, B.; Deutsch, M.; Brubach, J. -B.; Kalaboukhov, A.; Nucara, A.; Calvani, P.; Roy, P.. - In: JOURNAL OF SYNCHROTRON RADIATION. - ISSN 0909-0495. - 26:Pt 6(2019), pp. 1945-1950. [10.1107/S1600577519010920]
Grazing-angle reflectivity setup for the low-temperature infrared spectroscopy of two-dimensional systems
Nucara A.;Calvani P.;
2019
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.| File | Dimensione | Formato | |
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