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• W2480432849 abstract "The effect of strain in zigzag ribbons of monolayer transition-metal dichalcogenides with induced superconductivity is studied using a minimal 3-band tight-binding model. The unstrained system shows a topological phase with Majorana zero modes localized at the boundaries of the one-dimensional (1D) zigzag edges. By direct inspection of the spectrum and wave functions we examine the evolution of the topological phase as an in-plane, uniaxial deformation is imposed. It is found that strain shifts the energy of 1D edge states, thus causing a topological phase transition which eliminates the Majorana modes. For realistic parameter values, we show that the effect of strain can be changed from completely destructive -- in which case a small built in strain is enough to destroy the topological phase -- to a situation where strain becomes an effective tuning parameter which can be used to manipulate Majorana zero modes. These two regimes are accessible by increasing the value of the applied Zeeman field within realistic values. We also study how strain effects are affected by the chemical potential, showing in particular how unwanted effects can be minimized. Finally, as a cross-check of the obtained results, we reveal the connection between 1D Majorana zero modes in the zigzag edge and the multi-band Berry phase, which serves as a topological invariant of this system." @default.
• W2480432849 created "2016-08-23" @default.
• W2480432849 creator A5041960944 @default.
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• W2480432849 date "2016-11-14" @default.
• W2480432849 modified "2023-10-18" @default.
• W2480432849 title "Strain-induced topological phase transition at zigzag edges of monolayer transition-metal dichalcogenides" @default.
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• W2480432849 doi "https://doi.org/10.1103/physrevb.94.195419" @default.
• W2480432849 hasPublicationYear "2016" @default.
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