Topological features in the ferromagnetic Weyl semimetal CeAlSi: Role of domain walls

Autor(es):Mostrar menos -

Piva, M. M. ; Souza, J. C. ; Brousseau-Couture, V. ; Sorn, Sopheak ; Pakuszewski, K. R. ; John, Janas K. ; Adriano, C. ; Cote, M. ; Pagliuso, P. G. ; Paramekanti, Arun ; Nicklas, M.

• Tipo de documento: Artigo Científico
• Fonte: PHYSICAL REVIEW RESEARCH; v. 5, n. 1, p. 16-pg., 2023-01-31.

Resumo

In the ferromagnetic (FM) Weyl semimetal CeAlSi both space-inversion and time-reversal symmetries are broken. Our quantum oscillation (QO) data indicate that the FM ordering modifies the Fermi-surface topology and also leads to an unusual drop in the QO amplitude. In the FM phase, we find a pressure-induced suppression of the anomalous and the loop Hall effects. This cannot be explained based on the electronic band structure or magnetic structure, both of which are nearly pressure independent. Instead, we show that a simplified model describing the scattering of Weyl fermions off FM domain walls can potentially explain the observed topological features. Our study highlights the importance of domain walls for understanding transport in FM Weyl semimetals. (AU)

• Processo FAPESP: 17/10581-1 - Fenômenos emergentes em sistemas de dimensões reduzidas
• Beneficiário: Pascoal Jose Giglio Pagliuso
• Modalidade de apoio: Auxílio à Pesquisa - Projetos Especiais
• Processo FAPESP: 20/12283-0 - Microscopia de varredura de tunelamento em compostos com topologia não-trivial
• Beneficiário: Jean Carlo Souza
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Doutorado
• Processo FAPESP: 18/11364-7 - Propriedades magnéticas de sistemas complexos com topologia não-trivial
• Beneficiário: Jean Carlo Souza
• Modalidade de apoio: Bolsas no Brasil - Doutorado