Orbital selectivity of the kink in the dispersion of Sr2RuO4
H. Iwasawa, Y. Aiura, T. Saitoh, I. Hase, S. I. Ikeda, Y. Yoshida, H., Bando, M. Higashiguchi, Y. Miura, X.Y. Cui, K. Shimada, H. Namatame, M., Taniguchi
TL;DR
This study uses high-resolution ARPES to reveal orbital-dependent kinks in Sr2RuO4's electronic dispersion, showing a clear kink in the Ru 4d_xy orbital but not in others, providing insights into its origin.
Contribution
It demonstrates the orbital selectivity of the dispersion kink in Sr2RuO4, a novel observation that advances understanding of its electronic structure.
Findings
A clear kink observed in the Ru 4d_xy orbital
No kink detected in the Ru 4d_yz and 4d_zx orbitals
Provides insight into the origin of the dispersion kink
Abstract
We present detailed energy dispersions near the Fermi level on the monolayer perovskite ruthenate Sr2RuO4, determined by high-resolution angle-resolved photoemission spectroscopy. An orbital selectivity of the kink in the dispersion of Sr2RuO4 has been found: A kink for the Ru 4d_xy orbital is clearly observed, but not for the Ru 4d_yz and 4d_zx ones. The result provides insight into the origin of the kink.
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