Papers › Topological quantum switch and controllable quasi 1D wires in antimonene
Topological quantum switch and controllable quasi 1D wires in antimonene
Santosh Kumar Radha, Walter R. L. Lambrecht
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Based on the recently found non-trivial topology of buckled antimonene, we propose the conceptual design of a quantized switch that is protected by topology and a mechanism to create configurable 1D wire channels. We show that the topologically required edge states in this system can be turned on and off by breaking the inversion symmetry (reducing the symmetry from S₆ to C₃), which can be achieved by gating the system. This is shown to create a field-effect quantum switch projected by topology. Secondly we show that by locally gating the system with different polarity in different areas, a soliton-like domain wall is created at their interface, which hosts a protected electronic state, in which transport could be accessed by gated doping.
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