Regensburg 2019 – scientific programme

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TT: Fachverband Tiefe Temperaturen

TT 17: Poster Session: Correlated Electrons 1

TT 17.25: Poster

Monday, April 1, 2019, 15:00–18:30, Poster D

Charge-carrier doping in nickelate heterostructures — •Roberto Ortiz¹, Friederike Wrobel¹, Fanni Misják³, Benjamin Geisler², Katrin Fürsich¹, Martin Bluschke¹, Enrico Schierle⁴, Georg Christiani¹, Gennady Logvenov¹, Yi Wang¹, Peter van Aken¹, Bernhard Keimer¹, Ute Kaiser³, Rossitza Pentcheva², and Eva Benckiser¹ — ¹Max Planck Institute, Stuttgart, Germany — ²CENIDE, University Duisburg-Essen, Germany — ³University Ulm, Germany — ⁴Helmholtz-Zentrum, Berlin, Germany

Transition-metal oxides of the 3d series show a variety of interesting properties including robust metal-to-insulator transitions, multiferroicity and high-temperature superconductivity. One way to access these properties is to modify the charge carrier concentration by doping a particular system. In bulk materials, doping is mostly accomplished by substitution of cations, but the structural and chemical disorder generated in this way can drastically modify the electronic phase behavior and/or generate mesoscopic electronic inhomogeneities. We explore two distinctive methods of charge-carrier doping of nickelate heterostructures to investigate changes in the filling of 3d electronic states: The synthesis of LaNiO_2+x - band-insulator superlattices by ex-situ layer-selective chemical reduction and the transfer of charge across metal-oxide interfaces in nickelate-cuprate hybrid structures.