Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi

Alam, Md. Shahin; Fakhredine, Amar; Ahmed, Chuadhry Mujeeb; Tanwar, P. K.; Yang, Hung‐Yu; Tafti, Fazel; Cuono, Giuseppe; Islam, Rajibul; Singh, Bahadur; Lynnyk, Artem; Autieri, Carmine; Matusiak, Marcin

doi:10.48550/arxiv.2210.09764

2022

DOI: 10.48550/arxiv.2210.09764

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Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi

Md. Shahin Alam¹,

Amar Fakhredine²,

Chuadhry Mujeeb Ahmed³

et al.

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“…The magnetic structure of the RAlX family is easy to regulate and presents diverse magnetic ordering. For example, the magnetic structure of RAlX can be nonmagnetic [64][65][66], ferromagnetic [38][39][40][41][42][43][44][45][46][47][48][49], antiferromagnetic [49][50][51][52][53][54][55][56], ferrimagnetic [57][58][59][60] and even spiral magnetic [57,61] by rare earth element substitution. Such a rich magnetic structure makes the RAlX family an appropriate candidate to study the interaction between magnetism and Weyl fermions.…”

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Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal

Zhang

Wang

et al. 2023

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The study of interaction between electromagnetism and elementary particles is a long-standing topic in physics. Likewise, the connection between particle physics and emergent phenomena in condensed matter physics is a recurring theme and condensed matter physics has often provided a platform for investigating the interplay between particles and fields in cases that have not been observed in high-energy physics, so far. Here, using angle-resolved photoemission spectroscopy, we provide a new example of this by visualizing the electronic structure of a noncentrosymmetric magnetic Weyl semimetal candidate NdAlSi in both the paramagnetic and ferrimagnetic states. We observe surface Fermi arcs and bulk Weyl fermion dispersion as well as the regulation of Weyl fermions by ferrimagnetism. Our results establish NdAlSi as a magnetic Weyl semimetal and provide the first experimental observation of ferrimagnetic regulation of Weyl fermions in condensed matter.

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Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal

Zhang

Wang

et al. 2023

Preprint

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Sign change of the anomalous Hall effect and the anomalous Nernst effect in Weyl semimetal CeAlSi

Cited by 1 publication

References 0 publications

Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal

Ferrimagnetic Regulation of Weyl Fermions in a Noncentrosymmetric Magnetic Weyl Semimetal

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