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Strong anisotropy of the electron-phonon interaction in NbP probed by magnetoacoustic quantum oscillations

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Schindler,  Clemens
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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

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Schmidt,  Marcus
Marcus Schmidt, Chemical Metal Science, 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

Schindler, C., Gorbunov, D., Zherlitsyn, S., Galeski, S., Schmidt, M., Wosnitza, J., et al. (2020). Strong anisotropy of the electron-phonon interaction in NbP probed by magnetoacoustic quantum oscillations. Physical Review B, 102(16): 165156, pp. 1-7. doi:10.1103/PhysRevB.102.165156.


Cite as: http://hdl.handle.net/21.11116/0000-0007-7B5F-6
Abstract
In this study, we report on the observation of de Haas-van Alphen-type quantum oscillations (QOs) in the ultrasound velocity of NbP as well as "giant QOs" in the ultrasound attenuation in pulsed magnetic fields. The difference in the QO amplitude for different acoustic modes reveals a strong anisotropy of the effective deformation potential, which we estimate to be as high as 9 eV for certain parts of the Fermi surface. Furthermore, the natural filtering of QO frequencies and the tracing of the individual Landau levels to the quantum limit allows for a more detailed investigation of the Fermi surface of NbP, as was previously achieved by means of analyzing QOs observed in magnetization or electrical resistivity.