Band Structure Perfection and Superconductivity in Type-II Dirac Semimetal Ir<sub>1-</sub><sub>x</sub> Pt<sub>x</sub> Te<sub>2</sub>.
basic_science · Level V
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- Record sourced from PubMed, PMID 30019415.
- Also identified by DOI 10.1002/adma.201801556.
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Abstract
The discovery of a new type-II Dirac semimetal in Ir<sub>1-</sub><sub>x</sub> Pt<sub>x</sub> Te<sub>2</sub> 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<sub>1-</sub><sub>x</sub> Pt<sub>x</sub> Te<sub>2</sub> 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<sub>1-</sub><sub>x</sub> Pt<sub>x</sub> Te<sub>2</sub> 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.