Chiral sound waves in strained Weyl semimetals
arXiv:1904.09113 · doi:10.1103/PhysRevResearch.1.032040
Abstract
We show that a strained wire of a Weyl semimetal supports a new type of gapless excitation, the chiral sound wave (CSW). It is a longitudinal charge density wave analog to the chiral magnetic wave predicted in the quark-gluon plasma but driven by an elastic axial pseudo-magnetic field. It involves the axial-axial-axial contribution to the chiral anomaly which couples the chiral charge density to the elastic axial gauge field. The chiral sound is unidirectional: it propagates along the elastic magnetic field and not in the opposite direction. The CSW may propagate for long distances as it does not couple directly to quickly dissipating electromagnetic plasmons, while its damping is controlled by the slow chirality flip rate. We propose an experimental setup to directly detect the chiral sound, which is excited by mechanical vibrations of the crystal lattice in the GHz frequency range. Our findings contribute to a new trend, the chiral acoustics, in strained Weyl semimetals.
arXiv comment5 pages, 3 figures; v2: minor changes, published version
References in corpus (48)
- Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
- Discovery of a Three-dimensional Topological Dirac Semimetal, Na3Bi
- The Chiral Magnetic Effect
- Observation of the chiral anomaly induced negative magneto-resistance in 3D Weyl semi-metal TaAs
- Observation of a topological 3D Dirac semimetal phase in high-mobility Cd3As2
- Acoustic topological insulator and robust one-way sound transport
- Observation of Weyl nodes in TaAs
- Observation of the chiral magnetic effect in ZrTe5
- Gauge fields in graphene
- Discovery of a Weyl Fermion semimetal state in NbAs
- Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
- Electromagnetic Response of Weyl Semimetals
- Giant negative magnetoresistance induced by the chiral anomaly in individual Cd3As2 nanowires
- Topological negative refraction of surface acoustic waves in a Weyl phononic crystal
- Chiral anomaly and transport in Weyl metals
- Chiral Magnetic Wave
- Topological Sound
- Experimental signatures of the mixed axial-gravitational anomaly in the Weyl semimetal NbP
- Notes on Anomaly Induced Transport
- Elastic Gauge Fields in Weyl Semimetals
- Chiral anomaly from strain-induced gauge fields in Dirac and Weyl semimetals
- Fermi arc topology and interconnectivity in Weyl fermion semimetals TaAs, TaP, NbAs, and NbP
- Inhomogeneous Weyl and Dirac semimetals: Transport in axial magnetic fields and Fermi arc surface states from pseudo Landau levels
- Magnon Dirac materials
- Axial-field-induced chiral channels in an acoustic Weyl system
- Strain induced Chiral Magnetic Effect in Weyl semimetals
- Chiral Quasiparticles at the Fermi Surface of the Weyl Semimetal TaAs
- Phonon Magnetochiral Effect
- Consistent Chiral Kinetic Theory in Weyl Materials: Chiral Magnetic Plasmons
- Rotational strain in Weyl semimetals: A continuum approach
- Quantum oscillations without magnetic field
- Signatures of the chiral anomaly in phonon dynamics
- A Nernst current from the conformal anomaly in Dirac and Weyl semimetals
- Detecting Chiral Magnetic Effect by Lattice Dynamics
- Mixed axial-torsional anomaly in Weyl semimetals
- Anomalous Transport Due to the Conformal Anomaly
- Collapse of Landau levels in Weyl semimetals
- Hear the Sound of Weyl Fermions
- Emergent gravity in the cubic tight-binding model of Weyl semimetal in the presence of elastic deformations
- Elastic Gauge Fields and Hall Viscosity of Dirac Magnons
- Pseudomagnetic helicons
- Generation of strain-induced pseudo-magnetic field in a doped type-II Weyl semimetal
- Fingerprints of the conformal anomaly on the thermoelectric transport in Dirac and Weyl semimetals: Result from a Kubo formula
- Pseudomagnetic lens as a valley and chirality splitter in Dirac and Weyl materials
- Direct measurement of a beta function and an indirect check of the Schwinger effect near the boundary in Dirac-Weyl semimetals
- Chiral response in lattice models of Weyl materials
- Optical Signatures of the Chiral Anomaly in Mirror-Symmetric Weyl Semimetals
- The overdamped chiral magnetic wave
Cited by in corpus (19)
- Thermal transport, geometry, and anomalies
- Phonon helicity induced by electronic Berry curvature in Dirac materials
- Acoustogalvanic effect in Dirac and Weyl semimetals
- Phonon magnetochiral effect of band-geometric origin in Weyl semimetals
- Chiral Hall effect in strained Weyl semimetals
- Phonon-limited Transport and Fermi Arc Lifetime in Weyl Semimetals
- Anomalous Gravitational TTT Vertex, Temperature Inhomogeneity, and Pressure Anisotropy
- Chiral kinetic theory of anomalous transport induced by torsion
- Anomalous sound attenuation in Weyl semimetals in magnetic and pseudomagnetic fields
- Detection of phonon helicity in nonchiral crystals with Raman scattering
- Chiral magnetic waves in strongly coupled Weyl semimetals
- Pseudo-gauge Fields in Dirac and Weyl Materials
- Non-Abelian bosonization in a (3+1)-d Kondo semimetal via quantum anomalies
- Phonon helicity and Nieh-Yan Anomaly in the Kramers-Weyl semimetals of Chiral Crystals
- Anomalous plasmon mode in strained Weyl semimetals
- Detect Axial Gauge Fields with a Calorimeter
- Vortical waves in a quantum fluid with vector, axial, and helical charges. I. Non-dissipative transport
- Symmetries of Weyl Superconductors with Different Pairings
- Electric and chiral response to a pseudoelectric field in Weyl materials