# Landau diamagnetism and Weyl-fermion excitations in TaAs revealed by As75 NMR and NQR

@article{Wang2020LandauDA,
title={Landau diamagnetism and Weyl-fermion excitations in TaAs revealed by
As75
NMR and NQR},
author={Cheng Wang and Y. Honjo and L. X. Zhao and G. F. Chen and Kazuaki Matano and Rui Zhou and Guo-qing Zheng},
journal={Physical Review B},
year={2020},
volume={101},
pages={241110}
}
The electronic and superconducting properties associated with the topologically nontrivial bands in Weyl semimetals have recently attracted much attention. We report the microscopic properties of the type-I Weyl semimetal TaAs measured by $^{75}\mathrm{As}$ nuclear magnetic (quadrupole) resonance under zero and elevated magnetic fields over a wide temperature range up to 500 K. The magnetic susceptibility measured by the Knight shift $K$ is found to be negative at low magnetic fields and has a… Expand
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#### References

SHOWING 1-10 OF 49 REFERENCES
Anomalous hyperfine coupling and nuclear magnetic relaxation in Weyl semimetals
• Physics
• 2016
The electron-nuclear hyperfine interaction shows up in a variety of phenomena including, e.g., NMR studies of correlated states and spin decoherence effects in quantum dots. Here we focus on theExpand
Nuclear spin-lattice relaxation time in TaP and the Knight shift of Weyl semimetals
• Physics
• Physical Review B
• 2019
We first analyze the recent experimental data on the nuclear spin-lattice relaxation rate of the Weyl semimetal TaP. We argue that its nonmonotonic temperature dependence is explained by theExpand
Diamagnetism of nodal fermions
• Physics
• 2007
Free nodal fermionic excitations are simple but interesting examples of fermionic quantum criticality, in which the dynamic critical exponent $z=1$ and the quasiparticles are well defined. They ariseExpand
Emergent Weyl Fermion Excitations in TaP Explored by ^{181}Ta Quadrupole Resonance.
It is shown that Ta NQR is a novel probe for the bulk Weyl fermions and their excitations as well as the magnetic excitations at the Weyl nodes with temperature-dependent orbital hyperfine coupling. Expand
Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP
This work establishes the detailed Fermi-surface topology of the recently identified WSM TaP via combined angle-resolved quantum-oscillation spectra and band-structure calculations and observes a large negative longitudinal magnetoresistance. Expand
Landau quantization and quasiparticle interference in the three-dimensional Dirac semimetal Cd₃As₂.
Scanning tunnelling microscopy measurements at sub-kelvin temperatures and high magnetic fields on the II-V semiconductor Cd3As2.2 show that defects mostly influence the valence band, consistent with the observation of ultrahigh-mobility carriers in the conduction band. Expand
Observation of Weyl nodes in TaAs
Experiments show that TaAs is a three-dimensional topological Weyl semimetal. In 1929, H. Weyl proposed that the massless solution of the Dirac equation represents a pair of a new type of particles,Expand
Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal
Signs of the Weyl fermion chiral anomaly in the magneto-transport of TaAs are reported and it is observed that high mobility TaAs samples become more conductive as a magnetic field is applied along the direction of the current for certain ranges of the field strength. Expand
On the search for the chiral anomaly in Weyl semimetals: The negative longitudinal magnetoresistance
Recently, the existence of massless chiral (Weyl) fermions has been postulated in a class of semi-metals with a non-trivial energy dispersion.These materials are now commonly dubbed Weyl semi-metalsExpand
Ferromagnetic Spin Fluctuation and Unconventional Superconductivity in Rb2Cr3As3 Revealed by 75As NMR and NQR.
• Physics, Medicine
• Physical review letters
• 2015
In the superconducting state, 1/T(1) decreases rapidly below T(c) without a Hebel-Slichter peak, and follows a T(5) variation below T∼3  K, which points to unconventional superconductivity with point nodes in the gap function. Expand