Electronic Structure and Magnetism of the Triple-layered Ruthenate Sr4Ru3O10

Abstract

Strontium ruthenate oxides are among the 4d transition metal oxides, which are interesting for fundamental and applied research. In our recent work, PRB B 105, 165119 (2022), we reported the electronic band structure calculations for Sr₄Ru₃O₁₀ that display both ferromagnetic and metamagnetic behavior. The density functional calculations find the ground state to be ferromagnetic in agreement with the experiment. We find that the inclusion of the onsite Hubbard interaction U on the Ru 4d states has dramatic effects on the Fermi surface, which reveal the role of Coulomb interactions and correlated many-body physics. The minority spin bands are mainly empty with Fermi surfaces in the outer areas of the Brillouin zone with bands that disperse steeply upward. The majority-spin bands are full or nearly full and form narrow bands near the Fermi energy around the Brillouin zone center. The results are in qualitative agreement with recent angle-resolved photoemission spectroscopy (ARPES) experiments. 

In this presentation, I will discuss the recent results on the triple-layer structure and its development. Then, I will briefly present the different research activities of my group for collaboration possibilities to meet the goal of the US Africa Initiative for Electronic Structure sponsored by the APS.