AI Article Synopsis
- * Our research includes calculations on α-Bi/SnSe bilayers, revealing that these structures can exhibit a ferroelectrically switchable nonlinear anomalous Hall effect and significant spin-charge interconversion efficiencies.
- * The high efficiencies arise from the semimetallic behavior of low energy electron states, which can be identified as two-dimensional pseudo-Weyl fermions, supported by both numerical calculations and experimental techniques like angle-resolved photoemission spectroscopy.
Article Abstract
We show that proximity effects can be utilized to engineer van der Waals heterostructures (vdWHs) displaying semimetallic spin-ferroelectricity locking, where ferroelectricity and semimetallic spin states are confined to different layers, but are correlated by means of proximity effects. Our findings are supported by first principles calculations involving α-Bi/SnSe bilayers. We show that such systems support ferroelectrically switchable nonlinear anomalous Hall effect originating from large Berry curvature dipoles as well as direct and inverse spin Hall effects with giant bulk spin-charge interconversion efficiencies. The giant efficiencies are consequences of the proximity-induced semimetallic nature of low energy electron states, which are shown to behave as two-dimensional pseudo-Weyl fermions by means of symmetry analysis and first principles calculations as well as direct angle-resolved photoemission spectroscopy measurements.
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| http://dx.doi.org/10.1103/PhysRevLett.133.146605 | DOI Listing |
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