# Signature of type-II Weyl semimetal phase in MoTe2

@article{Jiang2017SignatureOT, title={Signature of type-II Weyl semimetal phase in MoTe2}, author={J. Jiang and Z.-K. Liu and Yijun Sun and Hf Yang and Catherine R. Rajamathi and Yanpeng Qi and L.X. Yang and Cheng Chen and H. Peng and C-C. Hwang and S. Sun and S. K. Mo and Ivana Vobornik and Jun Fujii and Stuart S. P. Parkin and Claudia Felser and B Yan and Yl Chen}, journal={Nature Communications}, year={2017}, volume={8} }

Topological Weyl semimetal (TWS), a new state of quantum matter, has sparked enormous research interest recently. Possessing unique Weyl fermions in the bulk and Fermi arcs on the surface, TWSs offer a rare platform for realizing many exotic physical phenomena. TWSs can be classified into type-I that respect Lorentz symmetry and type-II that do not. Here, we directly visualize the electronic structure of MoTe2, a recently proposed type-II TWS. Using angle-resolved photoemission spectroscopy… Expand

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#### References

SHOWING 1-10 OF 48 REFERENCES

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

- Physics, Medicine
- Nature materials
- 2016

This work identifies the Weyl points and demonstrates that they are connected by different sets of Fermi arcs for each of the two surface terminations and finds new surface 'track states' that form closed loops and are unique to type II Weyl semimetals. Expand

Superconductivity in Weyl semimetal candidate MoTe2

- Physics, Medicine
- Nature communications
- 2016

The sister compound of W Te2, MoTe2, predicted to be a Weyl semimetal and a quantum spin Hall insulator in bulk and monolayer form, is investigated and the observed dome-shaped superconductivity phase diagram provides insights into the interplay between super conductivity and topological physics. 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

MoTe2: Weyl and Line Node Topological Metal

- Physics
- 2015

Topological metals exhibit unremovable degeneracies in the band structure close to the Fermi level. These degeneracies can come in many types, the most basic of which are point (Weyl) and line nodes,… Expand

Weyl semimetal phase in the non-centrosymmetric compound TaAs

- Physics
- 2015

Experiments show that TaAs is a three-dimensional topological Weyl semimetal. Three-dimensional (3D) topologicalWeyl semimetals (TWSs) represent a state of quantum matter with unusual electronic… Expand

Prediction of an arc-tunable Weyl Fermion metallic state in MoxW1−xTe2

- Physics, Medicine
- Nature communications
- 2016

This work proposes a tunable Weyl state in MoxW1−xTe2 where Weyl nodes are formed by touching points between metallic pockets, and shows that the Fermi arc length can be changed as a function of Mo concentration, thus tuning the topological strength. 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

MoTe_{2}: A Type-II Weyl Topological Metal.

- Physics, Medicine
- Physical review letters
- 2016

With no strain, the number of observable surface Fermi arcs in this material is 2-the smallest number of arcs consistent with time-reversal symmetry, opening a wide range of possible experimental realizations of different topological semimetal phases. Expand

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… 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