Band Structure Perfection and Superconductivity in Type-II Dirac Semimetal Ir 1- x Pt x Te 2 .

Authors :: Fei F
Bo X
Wang P
Ying J
Li J
Chen K
Dai Q
Chen B
Sun Z
Zhang M
Qu F
Zhang Y
Wang Q
Wang X
Cao L
Bu H
Song F
Wan X
Wang B
Source :: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2018 Aug; Vol. 30 (35), pp. e1801556. Date of Electronic Publication: 2018 Jul 17.
Publication Year :: 2018
Abstract: The discovery of a new type-II Dirac semimetal in Ir <subscript>1-</subscript> <subscript>x</subscript> Pt <subscript>x</subscript> Te <subscript>2</subscript> 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 <subscript>1-</subscript> <subscript>x</subscript> Pt <subscript>x</subscript> Te <subscript>2</subscript> 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 <subscript>1-</subscript> <subscript>x</subscript> Pt <subscript>x</subscript> Te <subscript>2</subscript> 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.<br /> (© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

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