Abstract
By means of x-ray absorption spectroscopy and model Hartree–Fock calculations, we have investigated the electronic structure of layered t2g electron systems such as Ca2−xSrxRuO4 and Bi2Sr2Co2O9. For the hole-doped Co–O triangular lattice in Bi2Sr2Co2O9, the x-ray absorption spectral line shape indicates that the carriers in the t2g band mainly have the a1g symmetry. This result is supported by model Hartee–Fock calculations on the CoO2 lattice model. In Ca2−xSrxRuO4, the interplay between the orbital ordering and the Mott transition is demonstrated by the x-ray absorption measurement. It is shown that the orbital ordering accompanied by the lattice distortion is important in describing the insulating state of Ca2−xSrxRuO4. This idea is also supported by model Hartee–Fock calculations on the RuO2 lattice model.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
