Physics

Electronic and magnetic properties of the RuX₃ (X = Cl, Br, I) family: two siblings—and a cousin?

D. A. S. Kaib, K. Riedl, et al.

This groundbreaking research conducted by David A. S. Kaib and colleagues explores the electronic and magnetic properties of RuX₃ trihalides. The findings suggest that RuI₃ may be a quantum spin liquid candidate, challenging our understanding of metallic behavior and Mott insulators in these materials.

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Playback language: English

Index

Abstract

This paper presents a comparative analysis of the electronic and magnetic properties of RuX₃ (X = Cl, Br, I) trihalides. Using first-principles calculations and effective models, the authors conclude that RuI₃, like RuCl₃ and RuBr₃, is likely a Mott insulator, but with smaller magnetic moments and strong frustration. They predict nearly vanishing nearest-neighbor Heisenberg interaction in RuI₃, suggesting it's a quantum spin liquid candidate. The observed metallicity in RuI₃ samples is attributed to sample quality issues like grain boundaries and disorder, rather than intrinsic metallic behavior. A magnetic Hamiltonian for RuBr₃ is also derived, consistent with experimental evidence.

Publisher

npj Quantum Materials

Published On

Jul 29, 2022

Authors

David A. S. Kaib, Kira Riedl, Aleksandar Razpopov, Ying Li, Steffen Backes, Igor I. Mazin, Roser Valentí

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