Band Structure Perfection and Superconductivity in Type‐II Dirac Semimetal Ir₁₋<i>_x</i>Pt<i>_x</i>Te₂

Abstract

The discovery of a new type-II Dirac semimetal in Ir_1-_x Pt_x Te₂ with optimized band structure is described. Pt dopants protect the crystal structure holding the Dirac cones and tune the Fermi level close to the Dirac point. The type-II Dirac dispersion in Ir_1-_x Pt_x Te₂ is confirmed by angle-resolved photoemission spectroscopy and first-principles calculations. Superconductivity is also observed and persists when the Fermi level aligns with the Dirac points. Ir_1-_x Pt_x Te₂ is an ideal platform for further studies on the exotic properties and potential applications of type-II DSMs, and opens up a new route for the investigation of the possible topological superconductivity and Majorana physics.