Doping Induced Spin State Transition in LaCoO3: Dynamical Mean-Field Study

článek v časopise ve Web of Science, Jimp

angličtina

Hole and electron doped LaCoO3 is studied using dynamical mean-field theory. The one-particle spectra are analyzed and compared to the available experimental data, in particular the x-ray absorption spectra. Analyzing the temporal spin-spin correlation functions we find the atomic intermediate spin state is not important for the observed Curie-Weiss susceptibility. Contrary to the commonly held view about the roles played by the t2g and eg electrons we find narrow quasiparticle bands of t2g character crossing the Fermi level accompanied by strongly damped eg excitations

Spin state transition; Hubbard model; LDA+DMFT; Magnetic perovskites

AUGUSTINSKÝ, P.; KŘÁPEK, V.; KUNEŠ, J.

2013

28. 6. 2013

0031-9007

Physical Review Letters

110

26

Spojené státy americké

267204-1

267204-5

5