Tunable chirality of noncentrosymmetric magnetic Weyl semimetals

Abstract

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 RMC${}_2$ (R a rare-earth and M a transition metal), showing several members to be Weyl semimetals. Using the noncentrosymmetric ferromagnet NdRhC${}_2$ 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 tilt direction determines the sign of the resulting net chirality, opening up a simple route to control it.

arXiv comment7 pages, 3 figures, 1 table, and Supplemental Information

References in corpus (38)

• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Magnetic-field-induced quantized anomalous Hall effect in intrinsic magnetic topological insulator MnBi${}_2$Te${}_4$
• Topological nodal semimetals
• Giant anomalous Hall effect in a ferromagnetic Kagome-lattice semimetal
• Crystal Hall effect in Collinear Antiferromagnets
• Topological axion states in magnetic insulator MnBi${}_2$Te${}_4$ with the quantized magnetoelectric effect
• Magnetic Weyl Semimetal Phase in a Kagome Crystal
• Fermi-arc diversity on surface terminations of the magnetic Weyl semimetal Co3Sn2S2
• Large intrinsic anomalous Hall effect in half-metallic ferromagnet Co3Sn2S2 with magnetic Weyl fermions
• Evidence for Magnetic Weyl Fermions in a Correlated Metal
• The chiral anomaly and thermopower of Weyl fermions in the half-Heusler GdPtBi
• Berry Curvature, Triangle Anomalies, and the Chiral Magnetic Effect in Fermi Liquids
• Discovery of topological Weyl fermion lines and drumhead surface states in a room temperature magnet
• Experimental discovery of a topological Weyl semimetal state in TaP
• Weyl semimetal with broken time reversal and inversion symmetries
• Evidence for time-reversal symmetry breaking in the non-centrosymmetric superconductor LaNiC${}_2$
• Observation of Weyl nodes and Fermi arcs in TaP
• Gyrotropic magnetic effect and the magnetic moment on the Fermi surface
• Topological Hopf and chain link semimetal states and their application to Co2MnGa (Theory and Materials Prediction)
• An ideal Weyl semimetal induced by magnetic exchange
• Chiral magnetic effect and natural optical activity in (Weyl) metals
• The chiral anomaly factory: Creating Weyl fermions with a magnetic field
• Experimental realization of type-II Weyl state in non-centrosymmetric TaIrTe${}_4$
• Direct Observation of Nonequivalent Fermi-Arc States of Opposite Surfaces in Noncentrosymmetric Weyl Semimetal NbP
• Chiral degeneracies and Fermi-surface Chern numbers in bcc Fe
• The study of magnetic topological semimetals by first principles calculations
• Creating Weyl nodes and controlling their energy by magnetization rotation
• Observation of Fermi Arcs in non-Centrosymmetric Weyl Semi-metal Candidate NbP
• The electronic structure of {\em R}NiC${}_2$ intermetallic compounds
• Magnetism and charge density waves in RNiC${}_2$ (R = Ce, Pr, Nd)
• Giant photocurrent in asymmetric Weyl semimetals from the helical magnetic effect
• Single crystal study of the charge density wave metal LuNiC2
• Charge density wave and large non-saturating magnetoresistance in YNiC${}_2$ and LuNiC${}_2$
• Unpaired Weyl nodes from Long-Ranged Interactions: Fate of Quantum Anomalies
• Topological nodal lines and hybrid Weyl nodes in YCoC${}_2$
• Non-Local Annihilation of Weyl Fermions in Correlated Systems
• Field induced suppression of charge density wave in GdNiC${}_2$
• Chiral magnetic effect without chirality source in asymmetric Weyl semimetals

Cited by in corpus (8)

• Large anomalous Hall effect in single crystals of the kagome Weyl ferromagnet Fe${}_3$Sn
• Effect of chirality imbalance on Hall transport of PrRhC${}_2$
• Anisotropic optics and gravitational lensing of tilted Weyl fermions
• Efficiency and Mechanism of Heat Flux Rectification with Non-Reciprocal Surface Waves in Weyl-Semi-Metals
• Stability of Weyl node merging processes under symmetry constraints
• Coexistence of charge density wave and field-tuned magnetic states in TmNiC${}_2$
• Distinct quasiparticle interference patterns for surface impurity scattering on various Weyl semimetals
• Topological Metal-Insulator Transition within the Ferromagnetic state