Weyl metallic state induced by helical magnetic order
Abstract
In the rapidly expanding field of topological materials there is growing interest in systems whose topological electronic band features can be induced or controlled by magnetism. Magnetic Weyl semimetals, which contain linear band crossings near the Fermi level, are of particular interest owing to their exotic charge and spin transport properties. Up to now, the majority of magnetic Weyl semimetals have been realized in ferro- or ferrimagnetically ordered compounds, but a disadvantage of these materials for practical use is their stray magnetic field which limits the minimum size of devices. Here we show that Weyl nodes can be induced by a helical spin configuration, in which the magnetization is fully compensated. Using a combination of neutron diffraction and resonant elastic x-ray scattering, we find that EuCuAs develops a planar helical structure below = 14.5 K which induces Weyl nodes along the --A high symmetry line in the Brillouin zone.
Keywords
Cite
@article{arxiv.2305.00295,
title = {Weyl metallic state induced by helical magnetic order},
author = {Jian-Rui Soh and Irián Sánchez-Ramírez and Xupeng Yang and Jinzhao Sun and Ivica Zivkovic and J. Alberto Rodríguez-Velamazán and Oscar Fabelo and Anne Stunault and Alessandro Bombardi and Christian Balz and Manh Duc Le and Helen C. Walker and J. Hugo Dil and Dharmalingam Prabhakaran and Henrik M. Rønnow and Fernando de Juan and Maia G. Vergniory and Andrew T. Boothroyd},
journal= {arXiv preprint arXiv:2305.00295},
year = {2023}
}