Publications in Scientific Journals:
B Kim, P Liu, Z Ergönenc, A. Toschi, S. Khmelevskyi, C. Franchini:
"Lifshitz transition driven by spin fluctuations and spin-orbit renormalization in NaOsO_3";
Physical Review B,
In systems where electrons form both dispersive bands and small local spins, we show that changes in the spin configuration can tune the bands through a Lifshitz transition, resulting in a continuous metal-insulator transition associated with a progressive change in the Fermi surface topology. In contrast to the Mott-Hubbard and Slater pictures, this spin-driven Lifshitz transition appears in systems with a small electron-electron correlation and large hybridization. We show that this situation is realized in 5d distorted perovskites with half-filled t2g bands such as NaOsO3, where the strong p−d hybridization reduces the local moment, and spin-orbit coupling causes a large renormalization of the electronic mobility. This weakens the role of electronic correlations and drives the system towards an itinerant magnetic regime which enables spin fluctuations.
"Official" electronic version of the publication (accessed through its Digital Object Identifier - DOI)
Created from the Publication Database of the Vienna University of Technology.