Large nonsaturating magnetoresistance and signature of non-degenerate Dirac nodes in ZrSiS

Understand

While the discovery of Dirac and Weyl type excitations in electronic systems is a major breakthrough in recent condensed matter physics, finding appropriate materials for fundamental physics and technological applications, is an experimental challenge.

• In all the reported materials, linear dispersion survives only up to a few hundred meV from the Dirac or Weyl nodes.
• On the other hand, real materials are subject to uncontrolled doping during preparation and thermal effect near room temperature can hinder the rich physics.
• In ZrSiS, ARPES measurements have shown an unusually robust linear dispersion (up to $\sim$2 eV) with multiple non-degenerate Dirac nodes.