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

Abstract

In this study, we report on the observation of de Haas-van Alphen-type quantum oscillations (QO) in the ultrasound velocity of NbP as well as `giant QO' in the ultrasound attenuation in pulsed magnetic fields. The difference of the QO amplitude for different acoustic modes reveals a strong anisotropy of the effective deformation potential, which we estimate to be as high as $9\mathrm{eV}$ 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 QO observed in magnetization or electrical resistivity.

arXiv comment5 figures

References in corpus (20)

• Discovery of a Weyl Fermion Semimetal and Topological Fermi Arcs
• Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
• Weyl semimetal phase in non-centrosymmetric transition metal monophosphides
• Extremely large magnetoresistance and ultrahigh mobility in the topological Weyl semimetal NbP
• Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP
• Fermi arc topology and interconnectivity in Weyl fermion semimetals TaAs, TaP, NbAs, and NbP
• Quantum limit transport and destruction of the Weyl nodes in TaAs
• Quantum oscillations and the Fermi-surface topology of the Weyl semimetal NbP
• Modern semiclassical theory of magnetic transport and breakdown
• Topo-fermiology
• Pressure tuning the Fermi-surface topology of the Weyl semimetal NbP
• Density wave instabilities and surface state evolution in interacting Weyl semimetals
• Thermopower and thermal conductivity in the Weyl semimetal NbP
• Signature of chiral fermion instability in the Weyl semimetal TaAs above the quantum limit
• Quantum oscillations in acoustic phonons in Weyl semimetals
• Thermodynamic signatures of the field-induced states of graphite
• Charge density wave instabilities of type-II Weyl semimetals in a strong magnetic field
• Effect of uniaxial stress on the electronic band structure of NbP
• Field-induced gapless electron pocket in the superconducting vortex phase of YNi2B2C as probed by magnetoacoustic quantum oscillations
• Do Fourier analysis yield reliable amplitude of quantum oscillations?

Cited by in corpus (9)

• Ultrasound measurement technique for the single-turn-coil magnets
• Formation of an electron-phonon bi-fluid in bulk antimony
• Superconductivity in PtPb${}_4$ with Possible Nontrivial Band Topology
• Propagation of longitudinal acoustic phonons in ZrTe${}_5$ exposed to a quantizing magnetic field
• Severe violation of the Wiedemann-Franz law in quantum oscillations of NbP
• Fermi surface of magnetic kagome compound GdV6Sn6 investigated using de Haas van Alphen Oscillations
• Large Oscillatory Thermal Hall Effect in Kagome Metals
• Axionic Acoustic Phonons from Weyl Semimetals
• Search for magnetoacoustic quantum oscillations in the insulating phase of YbB${}_{12}$