# Spectroscopic evidence for a type II Weyl semimetallic state in MoTe2.

@article{Huang2016SpectroscopicEF, title={Spectroscopic evidence for a type II Weyl semimetallic state in MoTe2.}, author={Lunan Huang and Timothy M. McCormick and Masayuki Ochi and Zhiying Zhao and Michi-to Suzuki and Ryotaro Arita and Yun Wu and Daixiang Mou and Huibo Cao and Jiaqiang Yan and Nandini Trivedi and Adam Kaminski}, journal={Nature materials}, year={2016}, volume={15 11}, pages={ 1155-1160 } }

In a type I Dirac or Weyl semimetal, the low-energy states are squeezed to a single point in momentum space when the chemical potential μ is tuned precisely to the Dirac/Weyl point. Recently, a type II Weyl semimetal was predicted to exist, where the Weyl states connect hole and electron bands, separated by an indirect gap. This leads to unusual energy states, where hole and electron pockets touch at the Weyl point. Here we present the discovery of a type II topological Weyl semimetal state in…

## 365 Citations

Evidence for topological type-II Weyl semimetal WTe2

- Physics, MedicineNature Communications
- 2017

Exotic transport properties of type-II Weyl semimetals have been predicted but are yet to be experimentally evidenced and evidences of an anisotropy of negative magnetoresistance and a quantum oscillation arising from the predicted Weyl orbit in the type- II WeylSemimetal WTe2 are reported.

Signature of type-II Weyl semimetal phase in MoTe2

- Physics, MedicineNature communications
- 2017

This work directly visualize the electronic structure of MoTe2, a recently proposed type-II TWS, using angle-resolved photoemission spectroscopy (ARPES), and unravels the unique surface Fermi arcs, in good agreement with ab initio calculations that have nontrivial topological nature.

Searching for topological Fermi arcs via quasiparticle interference on a type-II Weyl semimetal MoTe2

- Physics, Materials Sciencenpj Quantum Materials
- 2018

Weyl semimetals display a novel topological phase of matter where the Weyl nodes emerge in pairs of opposite chirality and can be seen as either a source or a sink of Berry curvature. The exotic…

Observation of Weyl Nodes in Robust Type-II Weyl Semimetal WP_{2}.

- Physics, MedicinePhysical review letters
- 2019

The results ascertain that, due to the spin-orbit coupling, the Weyl nodes originate from the splitting of fourfold degenerate band-crossing points with Chern numbers C=±2 induced by the crystal symmetries of WP_{2}, which is unique among all the discovered WSMs.

Quasiparticle interference on type-I and type-II Weyl semimetal surfaces: a review

- Physics
- 2018

Abstract Weyl semimetals are a new member of the topological materials family, featuring a pair of singly degenerate Weyl cones with linear dispersion around the nodes in the bulk, and Fermi arcs on…

Discovery of a new type of topological Weyl fermion semimetal state in MoxW1−xTe2

- Physics, MedicineNature communications
- 2016

It is found that certain Weyl points are at the Fermi level, making MoxW1−xTe2 a promising platform for transport and optics experiments on Weyl semimetals.

Electronic properties of candidate type-II Weyl semimetal WTe
2
. A review perspective

- Physics, Materials ScienceElectronic Structure
- 2019

Currently, there is a flurry of research interest on materials with an unconventional electronic structure, and we have already seen significant progress in their understanding and engineering…

Topological surface Fermi arcs in the magnetic Weyl semimetal
Co3Sn2S2

- PhysicsPhysical Review B
- 2018

Very recently, the half-metallic compound Co3Sn2S2 was proposed to be a magnetic Weyl semimetal (WSM) with Weyl points only 60 meV above the Fermi level E-F. Owing to the low charge carrier density…

Visualizing Type-II Weyl Points in Tungsten Ditelluride by Quasiparticle Interference.

- Physics, MedicineACS nano
- 2017

Experimental proof that WTe2 is a type-II WSM is presented, and energy-dependent quasiparticle interference patterns are measured with a cryogenic scanning tunneling microscope, revealing the position of the Weyl point and its connection with the Fermi arc surface states, in agreement with prior theoretical predictions.

Universal response of the type-II Weyl semimetals phase diagram

- Physics
- 2017

The discovery of Weyl semimetals represents a significant advance in topological band theory. They paradigmatically enlarged the classification of topological materials to gapless systems while…

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