2019/01/30 by Ming-Xun Deng, G. Y. Qi, Guisheng Qi +10
Chemistry · Materials Science · Mathematics · Physics and Astronomy · #2D Materials and Applications #Chemistry #Condensed matter physics #Coupling (piping) #Critical field #Fermi level #Graphene research and applications #Landau quantization #MAJORANA #Magnetic field #Materials science #Mathematics #Monolayer #Nanotechnology #Physics #Quantum mechanics #Superconductivity #Symmetry (geometry) #Topological Materials and Phenomena #Transition metal #Zeeman effect #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.99.085106
published as Phys. Rev. B 99, 085106(2019) · Accepted by Phys. Rev. B
arxiv created 2019/01/30 · openalex publication_date 2019/02/04 · openalex created_date 2019/02/21 · arxiv updated 2019/12/10 · openalex updated_date 2026/08/05
We study the effect of inhomogeneous strain on transition-metal dichalcogenides with a large intrinsic gap in their spectrum. It is found that, by tuning the chemical potential, superconductivity can preserve within the strain-induced discrete pseudo Landau levels (LLs), which introduce interesting topological properties to these systems. As we show, the superconductivity for integer fillings is quantum critical, and the quantum critical coupling strength is determined by the spacing between the two LLs closest to the Fermi level. For partial fillings, the superconducting gap is scaled linearly with the coupling strength and decreases rapidly when the chemical potential shifts away from the middle of each LL. In the presence of a Zeeman field, a pair of Majorana modes emerges simultaneously in the two valleys of strained dichalcogenides. When valley symmetry is further destroyed, a single Majorana mode can be expected to emerge at the edges of the strained monolayer dichalcogenides.