DOAJ Open Access 2021

Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors

R. Ramazashvili P. D. Grigoriev T. Helm F. Kollmannsberger M. Kunz +7 lainnya

Abstrak

Abstract Most of solid-state spin physics arising from spin–orbit coupling, from fundamental phenomena to industrial applications, relies on symmetry-protected degeneracies. So does the Zeeman spin–orbit coupling, expected to manifest itself in a wide range of antiferromagnetic conductors. Yet, experimental proof of this phenomenon has been lacking. Here we demonstrate that the Néel state of the layered organic superconductor κ-(BETS)2FeBr4 shows no spin modulation of the Shubnikov–de Haas oscillations, contrary to its paramagnetic state. This is unambiguous evidence for the spin degeneracy of Landau levels, a direct manifestation of the Zeeman spin–orbit coupling. Likewise, we show that spin modulation is absent in electron-doped Nd1.85Ce0.15CuO4, which evidences the presence of Néel order in this cuprate superconductor even at optimal doping. Obtained on two very different materials, our results demonstrate the generic character of the Zeeman spin–orbit coupling.

Topik & Kata Kunci

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

Penulis (12)

R. Ramazashvili

P. D. Grigoriev

T. Helm

F. Kollmannsberger

M. Kunz

W. Biberacher

E. Kampert

H. Fujiwara

A. Erb

J. Wosnitza

R. Gross

M. V. Kartsovnik

Format Sitasi

APA MLA BibTeX

Ramazashvili, R., Grigoriev, P.D., Helm, T., Kollmannsberger, F., Kunz, M., Biberacher, W. et al. (2021). Experimental evidence for Zeeman spin–orbit coupling in layered antiferromagnetic conductors. https://doi.org/10.1038/s41535-021-00309-6

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Informasi Jurnal

Tahun Terbit: 2021
Sumber Database: DOAJ
DOI: 10.1038/s41535-021-00309-6
Akses: Open Access ✓