Axial-field-induced chiral channels in an acoustic Weyl system
arXiv:1806.09628 · doi:10.1038/s41567-019-0415-x
Abstract
Condensed-matter and other engineered systems, such as cold atoms, photonic, or phononic metamaterials, have proven to be versatile platforms for the observation of low-energy counterparts of elementary particles from relativistic field theories. These include the celebrated Majorana modes, as well as Dirac and Weyl fermions. An intriguing feature of the Weyl equation is the chiral symmetry, where the two chiral sectors have an independent gauge freedom. While this freedom leads to a quantum anomaly, there is no corresponding axial background field coupling differently to opposite chiralities in quantum electrodynamics. Here, we provide the experimental characterization of the effect of such an axial field in an acoustic metamaterial. We implement the axial field through an inhomogeneous potential and observe the induced chiral Landau levels. From the metamaterials perspective these chiral channels open the possibility for the observation of non-local Weyl orbits and might enable unidirectional bulk transport in a time-reversal invariant system.
References in corpus (7)
- Signatures of Majorana fermions in hybrid superconductor-semiconductor nanowire devices
- The Chiral Magnetic Effect
- Weyl Exceptional Rings in a Three-Dimensional Dissipative Cold Atomic Gas
- Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
- Soft self-assembly of Weyl materials for light and sound
- Quantum oscillations without magnetic field
- Tunable axial gauge fields in engineered Weyl semimetals: Semiclassical analysis and optical lattice implementations
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