Dresden 2014 – wissenschaftliches Programm
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TT: Fachverband Tiefe Temperaturen
TT 94: Low-Dimensional Systems: Oxide Hetero-Interfaces
TT 94.3: Vortrag
Donnerstag, 3. April 2014, 15:30–15:45, HSZ 204
Correlated electron states in realistic oxide heterostructures — •Frank Lechermann1, Lewin Boehnke1, Christoph Piefke1, and Daniel Grieger2 — 1I. Institut für Theoretische Physik, Universität Hamburg — 2SISSA, Via Bonomea 265, I-34136 Trieste
The interface physics that arises from merging different metal oxides is currently one of the most intensive condensed matter research areas.
For instance, bringing bulk band- and/or Mott-insulating materials together most often leads to the formation of an intricate two-dimensional electron gas (2DEG) at
the interface. This 2DEG may be susceptible to various orderings, e.g. ferromagnetism or superconductivity. Using the charge self-consistent combination of density functional theory (DFT) and dynamical mean-field
theory (DMFT) with a continuous-time quantum Monte Carlo impurity solution to DMFT, the relevance of electron correlation in many of these novel designed
materials will be elucidated. The methodology allows to treat many-body effects beyond static mean field on the realistic structural/chemical level of such challenging systems like LaTiO3/SrTiO3 superlattices [1].
F. Lechermann, L. Boehnke, and D. Grieger,
Phys. Rev. B 87, 241101(R) (2013)