Optical Signatures of Electronic Correlations in Transition Metal Oxides
- Date
- Jul 13, 2015
- Time
- 4:30 PM - 5:30 PM
- Speaker
- Dirk van der Marel
- Affiliation
- University of Geneva
- Series
- MPI-PKS Kolloquium
- Language
- en
- Main Topic
- Physik
- Other Topics
- Physik
- Host
- qudes15 workshop
- Description
- Using a combination of spectroscopic ellipsometry and DC transport measurements, we determine the temperature dependence of the optical conductivity of nickelate films on different substrates. The spectra show strong qualitative changes on the scale of 1 eV when the material passes through the metal-insulator transition, and additional weaker changes when it passes from the paramagnetic to the magnetically ordered phase. The spectral changes reveal the effect of bond-length disproportionation on the local electronic configuration of the nickel ions, and point toward a situation whereby the bond-disproportionated state is characterized by two types of nickel with qualitatively different electronic configurations.
Last modified: Jul 13, 2015, 9:37:52 AM
Location
Max-Planck-Institut für Physik komplexer Systeme (Seminarroom 1+2)Nöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
Organizer
Max-Planck-Institut für Physik komplexer SystemeNöthnitzer Straße3801187Dresden
- Phone
- + 49 (0)351 871 0
- MPI-PKS
- Homepage
- http://www.mpipks-dresden.mpg.de
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