Topological responses from chiral anomaly in multi-Weyl semimetals

Abstract

Multi-Weyl semimetals are a kind of topological phase of matter with discrete Weyl nodes characterized by multiple monopole charges, in which the chiral anomaly, the anomalous nonconservation of an axial current, occurs in the presence of electric and magnetic fields. Electronic transport properties related to the chiral anomaly in the presence of both electromagnetic fields and axial electromagnetic fields in multi-Weyl semimetals are systematically studied. It has been found that the anomalous Hall conductivity has a modification linear in the axial vector potential from inhomogeneous strains. The axial electric field leads to an axial Hall current that is proportional to the distance of Weyl nodes in momentum space. This axial current may generate chirality accumulation of Weyl fermions through delicately engineering the axial electromagnetic fields even in the absence of external electromagnetic fields. Therefore, this work provides a nonmagnetic mechanism of generation of chirality accumulation in Weyl semimetals and might shed new light on the application of Weyl semimetals in the emerging field of valleytronics.

13 pages, 2 tables, 2 figures, accepted by Physical Review B

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• Axial anomaly in multi-Weyl and triple-point semimetals
• Torsional Responses and Liouville Anomaly in Weyl Semimetals with Dislocations
• Chiral Hall effect in strained Weyl semimetals
• Topological quantum critical point in a triple-Weyl semimetal: non-Fermi-liquid behaviors and instabilities
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• Origin of Bardeen-Zumino current in lattice models of Weyl semimetals
• RKKY interaction of magnetic impurities in multi-Weyl semimetals
• Hamiltonian approach to the torsional anomalies and its dimensional ladder
• Anomalous Hall transport in tilted multi-Weyl semimetals
• Phase transitions in a holographic multi-Weyl semimetal
• Transport across junctions of a Weyl and a multi-Weyl semimetal
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• Electric, thermal, and thermoelectric magnetoconductivity for Weyl/multi-Weyl semimetals in planar Hall set-ups induced by the combined effects of topology and strain
• Non-Linear Hall Effect in Multi-Weyl Semimetals
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• Chiral response in lattice models of Weyl materials
• Helical Symmetry Breaking and Quantum Anomaly in Massive Dirac Fermions
• Charge Conservation Beyond Uniformity: Spatially Inhomogeneous Electromagnetic Response in Periodic Solids
• Chiral magnetic effect in lattice models of tilted multi-Weyl semimetals
• Anomalous sound attenuation in Weyl semimetals in magnetic and pseudomagnetic fields
• Photogalvanic response in multi-Weyl semimetals
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• Topology of Generalized Spinors and Chiral Anomaly
• Field theory approach to the quantum transport in Weyl semimetals
• Electronic properties of strained double-Weyl systems
• Emulating topological currents arising from a dipolar parity anomaly in two-dimensional optical lattices
• Topological phases in pseudospin-1 Fermi gases with two-dimensional spin-orbit coupling
• Unveiling the Chiral States in Multi-Weyl Semimetals through Magneto-Optical Spectroscopy
• Topological charge distributions of an interacting two-spin system
• Geometric transport signatures of strained multi-Weyl semimetals
• Strain-induced pseudomagnetic and scalar fields in symmetry-enforced Dirac nodes
• Electric and chiral response to a pseudoelectric field in Weyl materials
• Impact of Broken Inversion Symmetry on Molecular States in multi-Weyl fermions
• Chiral kinematic theory and converse vortical effects
• Current response to axial gauge fields in noncentrosymmetric magnetic Weyl semimetals
• Anomalous Chiral Anomaly in Spin-1 Fermionic Systems