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Observation of Weyl fermions in a magnetic non-centrosymmetric crystal
Daniel S. Sanchez, Guoqing Chang, Ilya Belopolski +15
Characterized by the absence of inversion symmetry, non-centrosymmetric materials are of great interest because they exhibit ferroelectricity, second harmonic generation, emergent…
A novel artificial condensed matter lattice and a new platform for one-dimensional topological phases
Ilya Belopolski, Su-Yang Xu, Nikesh Koirala +22
Engineered lattices in condensed matter physics, such as cold atom optical lattices or photonic crystals, can have fundamentally different properties from naturally-occurring elect…
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…
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…
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…
Unoccupied electronic structure and signatures of topological Fermi arcs in the Weyl semimetal candidate MoWTe
Ilya Belopolski, Su-Yang Xu, Yukiaki Ishida +30
Weyl semimetals have sparked intense research interest, but experimental work has been limited to the TaAs family of compounds. Recently, a number of theoretical works have predict…
A strongly robust Weyl fermion semimetal state in TaS
Guoqing Chang, Su-Yang Xu, Daniel S. Sanchez +11
Weyl semimetals are extremely interesting. Although the first Weyl semimetal was recently discovered in TaAs, research progress is still significantly hindered due to the lack of r…
Atomic Scale Visualization of Quantum Interference on a Weyl Semimetal Surface by Scanning Tunneling Microscopy/Spectroscopy
Hao Zheng, Su-Yang Xu, Guang Bian +19
Weyl semimetals may open a new era in condensed matter physics, materials science and nanotech after graphene and topological insulators. We report the first atomic scale view of t…
Spin polarization and texture of the Fermi arcs in the Weyl Fermion semimetal TaAs
Su-Yang Xu, Ilya Belopolski, Daniel S. Sanchez +25
A Weyl semimetal is a new state of matter that host Weyl fermions as quasiparticle excitations. The Weyl fermions at zero energy correspond to points of bulk band degeneracy, Weyl…
Arc-tunable Weyl Fermion metallic state in MoWTe
Tay-Rong Chang, Su-Yang Xu, Guoqing Chang +13
Weyl semimetals may open a new era in condensed matter physics because they provide the first example of Weyl fermions, realize a new topological classification even though the sys…
Theoretical Discovery/Prediction: Weyl Semimetal states in the TaAs material (TaAs, NbAs, NbP, TaP) class
Shin-Ming Huang, Su-Yang Xu, Ilya Belopolski +9
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…
Optical evidence of surface state suppression in Bi based topological insulators
Anjan A. Reijnders, Y. Tian, L. J. Sandilands +13
A key challenge in condensed matter research is the optimization of topological insulator (TI) compounds for the study and future application of their unique surface states. Truly…