Title: Magnetism in oxide semiconductors and orbital-spin physics in correlated oxides
Lecturer: Wu Hua Department of Physics, University of Cologne, Germany
Time: 9:00a.m., Thursday, April 1, 2010
Place: Room 321, main building of Institute of Solid State Physics
Abstract:
In the first part of my talk, it demonstrates defect pairing to be an origin of the novel “d0 magnetism”in C or N doped MgO and ZnO [1]. In the second part, it studies an uncommon failure of Jahn-Teller physics in the charge and orbital ordered La0.5Sr1.5MnO4 [2], and addresses a spin blockade and orbital multiplet states in the layered La1.5Sr0.5CoO4 [3]. All the presented results are based on density
functional calculations, with electron-correlation corrections and a hybrid functional when applicable, as well as cluster model multiplet calculations.
[1] H. Wu et al., submitted to PRL (March 2010).
[2] H. Wu et al., in preparation.
[3] H. Wu and T. Burnus, PRB (Rapid) 2009; H. Wu, PRB 201
