Artículo
Tunable chirality of noncentrosymmetric magnetic Weyl semimetals in rare-earth carbides
Ray, Rajyavardhan; Sadhukhan, Banasree; Richter, Manuel; Facio, Jorge Ismael
; van den Brink, Jeroen
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
12/2022
Editorial:
Nature
Revista:
npj Quantum Materials
ISSN:
2397-4648
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Even if Weyl semimetals are characterized by quasiparticles with well-defined chirality, exploiting this experimentally is severely hampered by Weyl lattice fermions coming in pairs with opposite chirality, typically causing the net chirality picked up by experimental probes to vanish. Here, we show this issue can be circumvented in a controlled manner when both time-reversal- and inversion symmetry are broken. To this end, we investigate chirality disbalance in the carbide family RMC2 (R a rare-earth and M a transition metal), showing several members to be Weyl semimetals. Using the noncentrosymmetric ferromagnet NdRhC2 as an illustrating example, we show that an odd number of Weyl nodes can be stabilized at its Fermi surface by properly tilting its magnetization. The chiral configuration endows a topological phase transition as the Weyl node transitions across the Fermi sheets, which triggers interesting chiral electromagnetic responses. Further, the tilt direction determines the sign of the resulting net chirality, opening up a simple route to control its sign and strength.
Palabras clave:
WEYL
,
SEMIMETALS
,
CHIRALILTY
,
TOPOLOGY
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Colecciones
Articulos (UE-INN - NODO BARILOCHE)
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Articulos de UNIDAD EJECUTORA INSTITUTO DE NANOCIENCIA Y NANOTECNOLOGIA - NODO BARILOCHE
Citación
Ray, Rajyavardhan; Sadhukhan, Banasree; Richter, Manuel; Facio, Jorge Ismael; van den Brink, Jeroen; Tunable chirality of noncentrosymmetric magnetic Weyl semimetals in rare-earth carbides; Nature; npj Quantum Materials; 7; 1; 12-2022; 1-17
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