# Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class

@article{Huang2015TheoreticalDW, title={Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class}, author={Shin-Ming Huang and Su-Yang Xu and Ilya Belopolski and Chi-Cheng Lee and Guoqing Chang and BaoKai Wang and Nasser Alidoust and Guang Bian and Madhab Neupane and Arun Bansil and Hsin Lin and M Zahid Hasan}, journal={Nature Communications}, year={2015} }

The recent discoveries of Dirac fermions in graphene and on the surface of topological insulators have ignited worldwide interest in physics and materials science. A Weyl semimetal is an unusual crystal where electrons also behave as massless quasi-particles but interestingly they are not Dirac fermions. These massless particles, Weyl fermions, were originally considered in massless quantum electrodynamics but have not been observed as a fundamental particle in nature. A Weyl semimetal provides… Expand

#### 91 Citations

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,… Expand

Experimental discovery of a topological Weyl semimetal state in TaP

- Physics, Medicine
- Science Advances
- 2015

The bulk-boundary correspondence is directly demonstrated and the topologically nontrivial nature of the Weyl semimetal state in TaP is established, by resolving the net number of chiral edge modes on a closed path that encloses the Wey node. Expand

Type-II Weyl semimetals

- Physics, Medicine
- Nature
- 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. Expand

Observation of Weyl nodes and Fermi arcs in tantalum phosphide

- Physics, Medicine
- Nature communications
- 2016

It is shown that TaP is a Weyl semimetal with only a single type of Weyl fermions, topologically distinguished from TaAs where two types of Weylefermions contribute to the low-energy physical properties. Expand

Experimental discovery of Weyl semimetal TaAs

- Materials Science, Physics
- 2015

Weyl semimetals are a class of materials that can be regarded as three-dimensional analogs of graphene breaking time reversal or inversion symmetry. Electrons in a Weyl semimetal behave as Weyl… Expand

Multiple Weyl fermions and tunable quantum anomalous Hall effect in 2D half-metal with huge spin-related energy gap

- Physics
- 2021

Abstract Topological states of matter in two-dimensional (2D) system, especially those combined with magnetism have received special attention currently, because of their new physics and the… Expand

Discovery of topological nodal-line fermionic phase in a magnetic material GdSbTe

- Medicine, Physics
- Scientific Reports
- 2018

The experimental discovery of an antiferromagnetic topological nodal-line semimetallic state in GdSbTe is reported using angle-resolved photoemission spectroscopy and the detailed electronic structure of the paramagnetic state is revealed. Expand

Unusual interlayer quantum transport behavior caused by the zeroth Landau level in YbMnBi2

- Physics, Medicine
- Nature Communications
- 2017

A surprising angular dependence of the interlayer magnetoresistivity and Hall conductivity arising from the lowest Landau level under high magnetic field in type II Weyl semimetal YbMnBi2. Expand

CaTe: a new topological node-line and Dirac semimetal

- Physics
- 2016

Combining first-principles calculations and effective model analysis, we predict that CaTe is a topological node-line semimetal in the absence of the spin-orbit coupling. Using a slab model, we… Expand

Disorder and magnetoconductivity in tilted Weyl semimetals

- Physics
- Physical Review B
- 2020

Gapless Weyl semimetals (WSMs) are a novel class of topological materials that host massless Weyl fermions as their low-energy excitations. When the Weyl cone is tilted, the Lorentz invariance is… Expand

#### References

SHOWING 1-10 OF 30 REFERENCES

Recent developments in transport phenomena in Weyl semimetals

- Physics
- 2013

The last decade has witnessed great advancements in the science and engineering of systems with unconventional band structures, seeded by studies of graphene and topological insulators. While the… Expand

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

- Physics, Medicine
- Nature 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. Expand

Topological response in Weyl semimetals and the chiral anomaly

- Physics
- 2012

We demonstrate that topological transport phenomena, characteristic of Weyl semimetals, namely the semiquantized anomalous Hall effect and the chiral magnetic effect (equilibrium… Expand

Weyl semimetals from noncentrosymmetric topological insulators

- Physics
- 2014

We study the problem of phase transitions from three-dimensional topological to normal insulators without inversion symmetry. In contrast with the conclusions of some previous work, we show that a… Expand

Dirac semimetal and topological phase transitions in A 3 Bi ( A = Na , K, Rb)

- Physics
- 2012

Three-dimensional (3D) Dirac point, where two Weyl points overlap in momentum space, is usually unstable and hard to realize. Here we show, based on the first-principles calculations and effective… Expand

Friedel oscillations due to Fermi arcs in Weyl semimetals

- Physics
- 2012

Weyl semimetals harbor unusual surface states known as Fermi arcs, which are essentially disjoint segments of a two dimensional Fermi surface. We describe a prescription for obtaining Fermi arcs of… Expand

Chern semimetal and the quantized anomalous Hall effect in HgCr2Se4.

- Physics, Medicine
- Physical 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. Expand

Three-dimensional Dirac semimetal and quantum transport in Cd3As2

- Physics
- 2013

Based on the first-principles calculations, we recover the silent topological nature of Cd3As2, a well known semiconductor with high carrier mobility. We find that it is a symmetry-protected… Expand

Weyl semimetal in a topological insulator multilayer.

- Physics, Medicine
- Physical 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. Expand

Topological semimetal and Fermi-arc surface states in the electronic structure of pyrochlore iridates

- Physics
- 2011

We investigate novel phases that emerge from the interplay of electron correlations and strong spin-orbit interactions. We focus on describing the topological semimetal, a three-dimensional phase of… Expand