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Weyl metallic state induced by helical magnetic order

Physics

Weyl metallic state induced by helical magnetic order

J. Soh, I. Sánchez-ramírez, et al.

This exciting research delves into the induction of Weyl nodes in EuCuAs through a helical spin configuration. Conducted by a team of authors including Jian-Rui Soh and Irián Sánchez-Ramírez, the study reveals the emergence of quadratic Weyl nodes induced by helical magnetic order, potentially paving the way for advanced device miniaturization.

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Playback language: English
Abstract
This paper investigates the induction of Weyl nodes in EuCuAs by a helical spin configuration. Using neutron diffraction and resonant elastic x-ray scattering, a planar helical spin structure is identified below 14.5 K, inducing two quadratic Weyl nodes with Chern numbers ±2 at the A point in the Brillouin zone. This demonstrates Weyl node induction by fully compensated helical magnetic order, offering advantages for device miniaturization.
Publisher
npj Quantum Materials
Published On
Jan 12, 2024
Authors
Jian-Rui Soh, Irián Sánchez-Ramírez, Xupeng Yang, Jinzhao Sun, Ivica Zivkovic, J. Alberto Rodríguez-Velamazán, Oscar Fabelo, Anne Stunault, Alessandro Bombardi, Christian Balz, Manh Duc Le, Helen C. Walker, J. Hugo Dil, Dharmalingam Prabhakaran, Henrik M. Rønnow, Fernando de Juan, Maia G. Vergniory, Andrew T. Boothroyd
Tags
Weyl nodes
helical spin configuration
neutron diffraction
resonant elastic x-ray scattering
EuCuAs
quadratic Weyl nodes
magnetic order
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