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Discovery of a new type of topological Weyl fermion semimetal state in MoWTe
Ilya Belopolski, Daniel S. Sanchez, Yukiaki Ishida +23
The recent discovery of a Weyl semimetal in TaAs offers the first Weyl fermion observed in nature and dramatically broadens the classification of topological phases. However, in Ta…
Atomic-scale visualization of quasiparticle interference on a type-II Weyl semimetal surface
Hao Zheng, Guang Bian, Guoqing Chang +15
We combine quasiparticle interference simulation (theory) and atomic resolution scanning tunneling spectro-microscopy (experiment) to visualize the interference patterns on a type-…
Observation of the spin-polarized surface state in a noncentrosymmetric superconductor BiPd
Madhab Neupane, Nasser Alidoust, M. Mofazzel Hosen +17
Recently, noncentrosymmetric superconductor BiPd has attracted considerable research interest due to the possibility of hosting topological superconductivity. Here we report a syst…
New fermions on the line in topological symmorphic metals
Guoqing Chang, Su-Yang Xu, Shin-Ming Huang +13
Topological metals and semimetals (TMs) have recently drawn significant interest. These materials give rise to condensed matter realizations of many important concepts in high-ener…
A new form of (unexpected) Dirac fermions in the strongly-correlated cerium monopnictides
Nasser Alidoust, A. Alexandradinata, Su-Yang Xu +14
Discovering Dirac fermions with novel properties has become an important front in condensed matter and materials sciences. Here, we report the observation of unusual Dirac fermion…
Measuring Chern numbers above the Fermi level in the Type II Weyl semimetal MoWTe
Ilya Belopolski, Su-Yang Xu, Yukiaki Ishida +30
It has recently been proposed that electronic band structures in crystals give rise to a previously overlooked type of Weyl fermion, which violates Lorentz invariance and, conseque…
Theoretical prediction of magnetic and noncentrosymmetric Weyl fermion semimetal states in the R-Al-X family of compounds (R=rare earth, Al=aluminium, X=Si, Ge)
Guoqing Chang, Bahadur Singh, Su-Yang Xu +18
Weyl semimetals are novel topological conductors that host Weyl fermions as emergent quasiparticles. While the Weyl fermions in high-energy physics are strictly defined as the mass…
Discovery of Lorentz-violating Weyl fermion semimetal state in LaAlGe materials
Su-Yang Xu, Nasser Alidoust, Guoqing Chang +18
We report theoretical and experimental discovery of Lorentz-violating Weyl fermion semimetal type-II state in the LaAlGe class of materials. Previously type-II Weyl state was predi…
Room-temperature magnetic topological semimetal state in half-metallic Heusler CoTiX (X=Si, Ge, or Sn)
Guoqing Chang, Su-Yang Xu, Hao Zheng +8
Topological semimetals (TSMs) including Weyl semimetals and nodal-line semimetals are expected to open the next frontier of condensed matter and materials science. Although the fir…
Signatures of the Adler-Bell-Jackiw chiral anomaly in a Weyl Fermion semimetal
Chenglong Zhang, Su-Yang Xu, Ilya Belopolski +20
Weyl semimetals provide the realization of Weyl fermions in solid-state physics. Among all the physical phenomena that are enabled by Weyl semimetals, the chiral anomaly is the mos…
Criteria for directly detecting topological Fermi arcs in Weyl semimetals
Ilya Belopolski, Su-Yang Xu, Daniel Sanchez +16
The recent discovery of the first Weyl semimetal in TaAs provides the first observation of a Weyl fermion in nature and demonstrates a novel type of anomalous surface state, the Fe…