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Journal Article

Propagation of longitudinal acoustic phonons in ZrTe5 exposed to a quantizing magnetic field

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Galeski,  Stanislaw
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Gooth,  Johannes
Nanostructured Quantum Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Ehmcke, T., Galeski, S., Gorbunov, D., Zherlitsyn, S., Wosnitza, J., Gooth, J., et al. (2021). Propagation of longitudinal acoustic phonons in ZrTe5 exposed to a quantizing magnetic field. Physical Review B, 104(24): 245117, pp. 1-12. doi:10.1103/PhysRevB.104.245117.


Cite as: https://hdl.handle.net/21.11116/0000-0009-BAF3-3
Abstract
The compound ZrTe5 has recently been connected to a charge-density-wave (CDW) state with intriguing transport properties. Here, we investigate quantum oscillations in ultrasound measurements that microscopically originate from electron-phonon coupling and analyze how these would be affected by the presence or absence of a CDW. We calculate the phonon self-energy due to electron-phonon coupling, and from there deduce the sound-velocity renormalization and sound attenuation. We find that the theoretical predictions for a metallic Dirac model resemble the experimental data on a quantitative level for magnetic fields up to the quantum-limit regime. © 2021 American Physical Society