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arXiv · 1907.03978

Dirac fermion and superconductivity in two-dimensional transition-metal MOH (M= Zr, Hf )

Ali Ebrahimian·Mehrdad Dadsetani·Reza Asgari
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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.

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Ali Ebrahimian, Mehrdad Dadsetani, Reza Asgari. 2019-11-26. Dirac fermion and superconductivity in two-dimensional transition-metal MOH (M= Zr, Hf ). https://doi.org/10.1103/physrevb.100.245120

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