Dresden 2014 – wissenschaftliches Programm
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MM: Fachverband Metall- und Materialphysik
MM 34: Poster Session
MM 34.33: Poster
Dienstag, 1. April 2014, 18:00–20:00, P4
Accessing the excitation and relaxation pathways in the ultrafast Carrier dynamics of BaSnO3:La perovskite — •Kestutis Budzinauskas1, Rolf Versteeg1, Matteo Montagnese1, Xuan Luo2, Sang W. Cheong2,3, and Paul H.M. Van Loosdrecht1 — 1II Physikalisches Institut,University of Cologne, Cologne, Germany — 2Laboratory of Pohang Emergent Materials and Department of Physics, Pohang, Korea — 3Rutgers Center for Emergent Materials and Department of Physics and Astronomy, New Jersey, USA
The Lanthanum doped Barium tin oxide BaSnO3:La is a transparent conducting oxide (TCO). Unlike other perovskites It shows an extremely high electron mobility, reaching values up to 320 cm2 V−1 s−1 at room temperature, making it a promising alternative to other more expensive or unstable TCO’s for applications.
The microscopic mechanisms leading to such high and uncharacteristic electron mean free paths are not fully understood. We have studied the non-equilibrium carrier dynamics in the material employing ultra-fast time-resolved spectroscopy in the visible, near Infrared and THz range of the optical spectrum. In this way we are able to track and elucidate the different carrier excitation and relaxation pathways in this intriguing compound.