Dirac fermions and superconductivity in the two-dimensional transition metals MOH(M=Zr,Hf)

Ali Ebrahimian; Mehrdad Dadsetani; Reza Asgari

doi:10.1103/PhysRevB.100.245120

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Dirac fermions and superconductivity in the two-dimensional transition metals MOH(M=Zr,Hf)

Ali Ebrahimian, Mehrdad Dadsetani, Reza Asgari

DOI 10.1103/PhysRevB.100.245120 · Physical Review B

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Abstract

Discovery of the new two-dimensional (2D) Dirac semimetals incorporating both superconductivity and the topological band structure has provided a novel platform for realizing the intriguing applications of Dirac fermions and Majorana quasiparticles, ranging from high-speed quantum devices at the nanoscale to topological quantum computations. In this work, utilizing first-principles calculations and symmetry analysis, we introduce MOH (M=Zr, Hf) as a new topological superconductor with Dirac points close to a Fermi level which are connected with nearly flat edge states as a striking feature of topological semimetals. Our calculations show that ZrOH as a 2D topological semimetal can exhibit superconductivity and is a novel platform for studying the interplay between superconductivity and Dirac states in low-dimensional materials.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
ZrOH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20	Pressure not reported	unknown
HfOH Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	20	Pressure not reported	unknown