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Charge dynamics of a noncentrosymmetric magnetic Weyl semimetal
oleh: R. Yang, M. Corasaniti, C. C. Le, C. Yue, Z. Hu, J. P. Hu, C. Petrovic, L. Degiorgi
Format: | Article |
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Diterbitkan: | Nature Portfolio 2022-10-01 |
Deskripsi
Abstract The interplay of topology with magnetism in Weyl semimetals recently arose to a vanguard topic, because of novel physical scenarios with anomalous transport properties. Here, we address the charge dynamics of the noncentrosymmetric and ferromagnetic (T Câ~â15 K) PrAlGe material and discover that it harbours electronic correlations, which are reflected in a sizeable reduction of the Fermi velocity with respect to the bare band value at low temperatures (T). At Tâ<âT C, the optical response registers a band reconstruction, which additionally causes a reshuffling of spectral weight, pertinent to the electronic environment of the type-I Weyl fermions and tracing the remarkable anomalous Hall conductivity (AHC). With the support of first-principles calculations, we provide evidence for the intimate relationship between a topological resonance of the absorption spectrum and the progressively enhanced occupation of non-trivial states with large Berry curvatures, a requirement for AHC.