DOAJ Open Access 2023

Coherent propagation of spin-orbit excitons in a correlated metal

Valentin Zimmermann Arvind Kumar Yogi Deniz Wong Christian Schulz Maciej Bartkowiak +7 lainnya

Abstrak

Abstract Collective excitations such as plasmons and paramagnons are fingerprints of atomic-scale Coulomb and exchange interactions between conduction electrons in metals. The strength and range of these interactions, which are encoded in the excitations’ dispersion relations, are of primary interest in research on the origin of collective instabilities such as superconductivity and magnetism in quantum materials. Here we report resonant inelastic x-ray scattering experiments on the correlated 4d-electron metal Sr2RhO4, which reveal a spin-orbit entangled collective excitation. The dispersion relation of this mode is opposite to those of antiferromagnetic insulators such as Sr2IrO4, where the spin-orbit excitons are dressed by magnons. The presence of propagating spin-orbit excitons implies that the spin-orbit coupling in Sr2RhO4 is unquenched, and that collective instabilities in 4d-electron metals and superconductors must be described in terms of spin-orbit entangled electronic states.

Topik & Kata Kunci

Materials of engineering and construction. Mechanics of materials Atomic physics. Constitution and properties of matter

Penulis (12)

Valentin Zimmermann

Arvind Kumar Yogi

Deniz Wong

Christian Schulz

Maciej Bartkowiak

Klaus Habicht

Lichen Wang

Masahiko Isobe

Matteo Minola

Giniyat Khaliullin

Bernhard Keimer

Matthias Hepting

Format Sitasi

APA MLA BibTeX

Zimmermann, V., Yogi, A.K., Wong, D., Schulz, C., Bartkowiak, M., Habicht, K. et al. (2023). Coherent propagation of spin-orbit excitons in a correlated metal. https://doi.org/10.1038/s41535-023-00585-4

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Informasi Jurnal

Tahun Terbit: 2023
Sumber Database: DOAJ
DOI: 10.1038/s41535-023-00585-4
Akses: Open Access ✓