Shu-Chun Wu

Negative magnetoresistance without well-defined chirality in the Weyl semimetal TaP

Weyl semimetals (WSMs) are topological quantum states wherein the electronic bands disperse linearly around pairs of nodes with fixed chirality, the Weyl points. In WSMs, nonorthogonal electric and magnetic fields induce an exotic phenomenon known as the chiral anomaly, resulting in an unconventional negative longitudinal magnetoresistance, the chiral-magnetic effect. However, it remains an open question to which extent this effect survives when chirality is not well-defined. Here, we establish the detailed Fermi-surface topology of the recently identified WSM TaP via combined angle-resolved quantum-oscillation spectra and band-structure calculations. The Fermi surface forms banana-shaped electron and hole pockets surrounding pairs of Weyl points. Although this means that chirality is ill-defined in TaP, we observe a large negative longitudinal magnetoresistance. We show that the magnetoresistance can be affected by a magnetic field-induced inhomogeneous current distribution inside the sample.

Prediction of Weyl semimetal in orthorhombic MoTe2

We investigate the orthorhombic phase

Superconductivity in Weyl semimetal candidate MoTe2

({T}_{d})

Graphene-Based Topological Insulator with an Intrinsic Bulk Band Gap above Room Temperature

of the layered transition-metal dichalcogenide

Topological surface states and Fermi arcs of the noncentrosymmetric Weyl semimetals TaAs, TaP, NbAs, and NbP

{\mathrm{MoTe}}_{2}

Robust 2D Topological Insulators in van der Waals Heterostructures

as a Weyl semimetal candidate.

Multiple Dirac cones at the surface of the topological metal LaBi

{\mathrm{MoTe}}_{2}

Observation of pseudo-two-dimensional electron transport in the rock salt-type topological semimetal LaBi

exhibits four pairs of Weyl points lying slightly above

Observation of unusual topological surface states in half-Heusler compounds LnPtBi (Ln=Lu, Y)

(\ensuremath{\sim}6\phantom{\rule{0.16em}{0ex}}\mathrm{meV})

Weak topological insulators induced by the interlayer coupling: A first-principles study of stacked Bi2TeI

the Fermi energy in the bulk band structure. Different from its cousin