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Regensburg 2013 – wissenschaftliches Programm

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MA: Fachverband Magnetismus

MA 42: Focus Session: Dynamical Mean-Field Approach to Correlated Electron Materials (jointly with MA)

MA 42.3: Topical Talk

Donnerstag, 14. März 2013, 16:00–16:30, H20

Photoemission Study of Correlated Oxides at High TemperaturesJonas Weinen1, Stefano Agrestini1, Martin Rotter1, Alexander Komarek1, Yen-Fa Liao2, Ku-Ding Tsuei2, Chien-Te Chen2, and •Hao Tjeng11Max Planck Institute for Chemical Physics of Solids, Dresden, Germany — 2National Synchrotron Radiation Research Center, Hsinchu, Taiwan

Strongly correlated oxides show often quite spectacular and intriguing properties which can be traced back to the presence of several competing interactions leading to various forms of ordered phases at low temperatures. In order to unravel which of the interactions are relevant, we have set out to study the excitation spectra of the several benchmark oxides as a function of temperature. By carrying out bulk-sensitive hard-x-ray photoemission experiments at high temperatures, we can follow the changes in the spectra and thereby determine which and how local spin and orbital degrees of freedom as well as nearest neighbour spin-spin correlations influence the intricate and complex electronic structure of correlated oxides.

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