2019/09/30 by Song-Bo Zhang, Jianhui Zhou
Materials Science · Physics and Astronomy · #Band gap #Condensed matter physics #Dispersion (optics) #Electron #Fermi Gamma-ray Space Telescope #Fermi energy #Fermi surface #Graphene research and applications #Magnetic field #Oscillation (cell signaling) #Phonon #Physics #Quantum mechanics #Quantum oscillations #Quantum, superfluid, helium dynamics #Semimetal #Superconductivity #Topological Materials and Phenomena #Weyl semimetal #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.101.085202
published as Phys. Rev. B 101, 085202 (2020) · 12 pages, 8 figures; Accepted version to PRB
arxiv created 2020/02/03 · openalex publication_date 2020/02/03 · arxiv updated 2020/02/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We theoretically study the modification of the energy spectrum of long-wavelength acoustic phonons due to the electron-phonon interaction in a three-dimensional topological Weyl semimetal under the influence of quantizing magnetic fields. We find that the dispersion and attenuation of phonons show striking oscillatory behaviors when varying the magnetic field at low temperatures. These oscillations are distinct when the Fermi energy is in different energy regimes. Moreover, the van Hove singularity of the Weyl spectrum can manifest as a transition between different oscillation patterns when increasing the magnetic field. These phonon behaviors could provide testable fingerprints of the Fermi-surface morphology and relativistic feature of the Weyl semimetal.