Numerous nodal-line semimetal candidates have been predicted and experimentally examined. To realize a genuine semimetal, the Dirac nodes must be robust against spin-orbit coupling lie close to Fermi level so as allow for manifestation of novel properties. By performing band structure calculations angle-resolved photoemission measurements, direct evidence is provided here realization in LaSbTe....

Dirac measure is an important measure in many related branches to mathematics. The current paper characterizes measure-preserving transformations between two Dirac measure spaces or a Dirac measure space and a probability measure space. Also, it studies isomorphic Dirac measure spaces, equivalence Dirac measure algebras, and conjugate of Dirac measure spaces. The equivalence classes of a Dirac ...

We report calculations of the electronic structure of silicene and the stability of its weakly buckled honeycomb lattice in an external electric field oriented perpendicular to the monolayer of Si atoms. The electric field produces a tunable band gap in the Dirac-type electronic spectrum, the gap being suppressed by a factor of about eight by the high polarizability of the system. At low electr...