# Weyl semimetals, Fermi arcs and chiral anomalies.

@article{Jia2016WeylSF, title={Weyl semimetals, Fermi arcs and chiral anomalies.}, author={Shuang Jia and Su-Yang Xu and M Zahid Hasan}, journal={Nature materials}, year={2016}, volume={15 11}, pages={ 1140-1144 } }

Physicists have discovered a new topological phase of matter, the Weyl semimetal, whose surface features a non-closed Fermi surface whereas the low-energy quasiparticles in the bulk emerge as Weyl fermions. A brief review of these developments and perspectives on the next steps forward are presented.

## 190 Citations

Discovery of Weyl fermion semimetals and topological Fermi arc states

- Physics
- 2017

Weyl semimetals are conductors whose low-energy bulk excitations are Weyl fermions, whereas their surfaces possess metallic Fermi arc surface states. These Fermi arc surface states are protected by a…

Collapse of Landau levels in Weyl semimetals

- Physics
- 2017

It is known that in two-dimensional relativistic Dirac systems, the Landau levels can collapse in the presence of a critical in-plane electric field. We extend this mechanism to three-dimensional…

Direct optical detection of Weyl fermion chirality in a topological semimetal

- Physics
- 2017

Measuring the photocurrent response to circularly polarized mid-infrared light provides direct access to the chirality of Weyl fermions in Weyl semimetals — the property responsible for a range of…

Weyl and Dirac semimetals in three-dimensional solids

- Physics
- 2018

Weyl and Dirac semimetals are three-dimensional phases of matter with gapless electronic excitations that are protected by topology and symmetry. As three-dimensional analogs of graphene, they have…

On transport properties of Weyl semimetals

- Physics
- 2017

The main topics of this thesis are the surface Fermi arcs and transport properties of Weyl semimetals. The thesis begins with a general introduction in chapter one. Chapter two addresses transport…

Landau Quantization in Coupled Weyl Points: A Case Study of Semimetal NbP.

- PhysicsNano letters
- 2018

It is demonstrated that the coupling between Weyl points can significantly modify the electronic structure of a WSM and provide a new twist to the protected states, suggesting that the coupled Weyl Points should be considered as the basis for analysis of realistic WSMs.

Topologically distinct Weyl fermion pairs

- PhysicsScientific reports
- 2021

It is demonstrated that the magnetic tunneling does not always expel LLs from zero energy because the number of zero-energy modes is protected by the vorticity of the Weyl nodes, instead of the chirality.

Quantum transport in Dirac and Weyl semimetals: a review

- Physics
- 2017

Abstract Topological semimetals are well known for the linear energy band dispersion in the bulk state and topologically protected surface state with arc-like Fermi surface. The angle resolved…

Weyl, Dirac and high-fold chiral fermions in topological quantum materials

- Physics
- 2021

Quantum materials hosting Weyl fermions have opened a new era of research in condensed matter physics. First proposed in 1929 in the context of particle physics, Weyl fermions have yet to be observed…

Crystal growth and quantum oscillations in the topological chiral semimetal CoSi

- Physics, Materials SciencePhysical Review B
- 2019

We survey the electrical transport properties of the single-crystalline, topological chiral semimetal CoSi which was grown via different methods. High-quality CoSi single crystals were found in the…

## References

SHOWING 1-10 OF 35 REFERENCES

A Weyl Fermion semimetal with surface Fermi arcs in the transition metal monopnictide TaAs class

- PhysicsNature communications
- 2015

The results show that in the TaAs-type materials the WeylSemimetal state does not depend on fine-tuning of chemical composition or magnetic order, which opens the door for the experimental realization of Weyl semimetals and Fermi arc surface states in real materials.

Discovery of a Weyl fermion semimetal and topological Fermi arcs

- PhysicsScience
- 2015

The experimental discovery of a Weyl semimetal, tantalum arsenide (TaAs), using photoemission spectroscopy, which finds that Fermi arcs terminate on the Weyl fermion nodes, consistent with their topological character.

Criteria for Directly Detecting Topological Fermi Arcs in Weyl Semimetals.

- PhysicsPhysical review letters
- 2016

It is shown that it is unreasonable to directly observe Fermi arcs in NbP by ARPES within available experimental resolution and spectral linewidth, and rigorously demonstrate a nonzero Chern number in TaAs by counting chiral edge modes on a closed loop.

Type-II Weyl semimetals

- PhysicsNature
- 2015

This work proposes the existence of a previously overlooked type of Weyl fermion that emerges at the boundary between electron and hole pockets in a new phase of matter and discovers a type-II Weyl point, which is still a protected crossing, but appears at the contact of electron and Hole pockets in type- II Weyl semimetals.

Chern semimetal and the quantized anomalous Hall effect in HgCr2Se4.

- PhysicsPhysical review letters
- 2011

It is predicted, based on first principles calculations, that such a novel quantum state can be realized in a known ferromagnetic compound HgCr2Se4, with a single pair of Weyl fermions separated in momentum space.

Discovery of a Weyl fermion state with Fermi arcs in niobium arsenide

- Physics
- 2015

Three types of fermions play a fundamental role in our understanding of nature: Dirac, Majorana and Weyl. Whereas Dirac fermions have been known for decades, the latter two have not been observed as…

Signatures of the Adler–Bell–Jackiw chiral anomaly in a Weyl fermion semimetal

- PhysicsNature communications
- 2016

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.

Quantum oscillations from surface Fermi arcs in Weyl and Dirac semimetals.

- PhysicsNature communications
- 2014

It is found that the open Fermi arcs participate in unusual closed magnetic orbits by traversing the bulk of the sample to connect opposite surfaces, and result in quantum oscillations that contain observable signatures of the topological character of the bulk Weyl semimetal.

Weyl semimetal in a topological insulator multilayer.

- PhysicsPhysical review letters
- 2011

The Weyl semimetal has a nonzero dc conductivity at zero temperature, but Drude weight vanishing as T(2), and is thus an unusual metallic phase, characterized by a finite anomalous Hall conductivity and topologically protected edge states.

Observation of Weyl nodes in TaAs

- Physics
- 2015

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,…