Pseudomagnetic helicons

Abstract

The existence of pseudomagnetic helicons is predicted for strained Dirac and Weyl materials. The corresponding collective modes are reminiscent of the usual helicons in metals in strong magnetic fields but can exist even without a magnetic field due to a strain-induced background pseudomagnetic field. The properties of both pseudomagnetic and magnetic helicons are investigated in Weyl matter using the formalism of the consistent chiral kinetic theory. It is argued that the helicon dispersion relations are affected by the electric and chiral chemical potentials, the chiral shift, and the energy separation between the Weyl nodes. The effects of multiple pairs of Weyl nodes are also discussed. A simple setup for experimental detection of pseudomagnetic helicons is proposed.

19 pages, 6 multipanel figures; published version with new section IV on Weyl/Dirac materials with multiple pairs of Weyl nodes

References in corpus (10)

• Berry Curvature, Triangle Anomalies, and the Chiral Magnetic Effect in Fermi Liquids
• Consequences of a condensed matter realization of Lorentz violating QED in Weyl semi-metals
• Chiral anomaly from strain-induced gauge fields in Dirac and Weyl semimetals
• Electron scattering in tantalum monoarsenide
• Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
• Strain induced Chiral Magnetic Effect in Weyl semimetals
• Quantum oscillations without magnetic field
• Emergent gravity and chiral anomaly in Dirac semimetals in the presence of dislocations
• Dirac semimetals $A_{3}Bi$ ($A$=Na,K,Rb) as $Z_2$ Weyl semimetals
• Chiral magnetic plasmons in anomalous relativistic matter

Cited by in corpus (3)

• Tunable axial gauge fields in engineered Weyl semimetals: Semiclassical analysis and optical lattice implementations
• Origin of Bardeen-Zumino current in lattice models of Weyl semimetals
• Chiral response in lattice models of Weyl materials