DFT shows that a buckled-to-flat transition at 17.5% strain makes 2D Bi metallic, and that an out-of-plane field can switch which MoS2 layer forms an Ohmic contact.
(a)–(e) Band structures under positive electric fields correspond to electric fields from 0.05 V/Å to 0.3 V/Å
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Pressure-Driven Metallicity in {\AA}ngstr\"om-Thickness 2D Bismuth and Layer-Selective Ohmic Contact to MoS2
DFT shows that a buckled-to-flat transition at 17.5% strain makes 2D Bi metallic, and that an out-of-plane field can switch which MoS2 layer forms an Ohmic contact.