Berlin 2015 – wissenschaftliches Programm
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DS: Fachverband Dünne Schichten
DS 26: Layer Properties: Electrical, Optical, and Mechanical Properties
DS 26.9: Vortrag
Mittwoch, 18. März 2015, 17:15–17:30, H 2032
Optical and transport properties of epitaxial Nd1.83Ce0.17CuO4 thin films — •Anita Guarino1, Adolfo Avella1, Carmela Bonavolontà2, Massimo Valentino2, Corrado Di Lisio2, Loredana Parlato2, Antonio Leo1, Gaia Grimaldi1, Sandro Pace1, Giampiero Pepe2, Antonio Vecchione1, and Angela Nigro1 — 1CNR-SPIN Salerno and Dipartimento di Fisica E R Caianiello, Università di Salerno, via Giovanni Paolo II, 132, Fisciano (SA), Italy — 2CNR-SPIN Napoli and Dipartimento di Fisica Università Federico II di Napoli, via Cinthia, 80126 Napoli, Italy
Electrical transport measurements and transient optical pump-probe experiments have been performed on epitaxial films of the electron doped Nd1.83C0.17CuO4 compound for studying the non-equilibrium carrier dynamics in this material. In particular, the value of the quasiparticle relaxation time has been estimated in order to investigate the possible use of this compound as base material for superconducting optical detectors. Samples have been grown on (001)-oriented SrTiO3 substrates by dc sputtering in a mixed atmosphere of both Ar and O2. X-ray diffraction analysis and Scanning Electron Microscope equipped with a wavelength dispersive spectroscopy detector have been used to characterize the structure and the morphology and composition of the thin films. Time-solved femtosecond pump-and-probe spectroscopy has been also carried out on our samples in the temperature range 4.2K-300 K. The data demonstrate a clear correlation between electrical and optical features.