DOAJ Open Access 2022

Tuneable electron–magnon coupling of ferromagnetic surface states in PdCoO2

F. Mazzola C. -M. Yim V. Sunko S. Khim P. Kushwaha +9 lainnya

Abstrak

Abstract Controlling spin wave excitations in magnetic materials underpins the burgeoning field of magnonics. Yet, little is known about how magnons interact with the conduction electrons of itinerant magnets, or how this interplay can be controlled. Via a surface-sensitive spectroscopic approach, we demonstrate a strong electron–magnon coupling at the Pd-terminated surface of the delafossite oxide PdCoO2, where a polar surface charge mediates a Stoner transition to itinerant surface ferromagnetism. We show how the coupling is enhanced sevenfold with increasing surface disorder, and concomitant charge carrier doping, becoming sufficiently strong to drive the system into a polaronic regime, accompanied by a significant quasiparticle mass enhancement. Our study thus sheds light on electron–magnon interactions in solid-state materials, and the ways in which these can be controlled.

Topik & Kata Kunci

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

Penulis (14)

F. Mazzola

C. -M. Yim

V. Sunko

S. Khim

P. Kushwaha

O. J. Clark

L. Bawden

I. Marković

D. Chakraborti

T. K. Kim

M. Hoesch

A. P. Mackenzie

P. Wahl

P. D. C. King

Format Sitasi

APA MLA BibTeX

Mazzola, F., Yim, C.-., Sunko, V., Khim, S., Kushwaha, P., Clark, O.J. et al. (2022). Tuneable electron–magnon coupling of ferromagnetic surface states in PdCoO2. https://doi.org/10.1038/s41535-022-00428-8

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Informasi Jurnal

Tahun Terbit: 2022
Sumber Database: DOAJ
DOI: 10.1038/s41535-022-00428-8
Akses: Open Access ✓