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- W4310040211 abstract "We study the quantum valley and Hall conductances in silicene coupled to a ferroelectric (FE) layer. The spin orbit interaction in silicene couples the valley, pseudospin, and real spin degrees of freedom resulting in a topological Berry curvature in the system. The finite Berry curvature in turn induces a transverse Hall conductance. In particular, if the Fermi level E f is within the bulk energy gap, the Hall conductance is quantized to integer multiples of π . We study the quantum spin and valley Hall conductivities (QSH and QVH) as functions of the applied out-of-plane electric field for different values of E f and temperature. Both conductivities vary linearly as 1/| E f | when E f is within the conduction or valence bands but reach a quantized plateau value when E f is within the bulk gap. Further, by coupling silicene to a FE layer, the QSH and QVH signals can be modulated by means of the coupling strength. This can potentially provide a robust topological memory read-out with distinct binary outputs over a wide temperature range." @default.
- W4310040211 created "2022-11-30" @default.
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- W4310040211 date "2022-11-25" @default.
- W4310040211 modified "2023-10-18" @default.
- W4310040211 title "Valley and spin quantum Hall conductance of silicene coupled to a ferroelectric layer" @default.
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- W4310040211 doi "https://doi.org/10.3389/fphy.2022.1021192" @default.
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