Control over Berry Curvature Dipole with Electric Field in WTe2

Abstract

Berry curvature dipole plays an important role in various nonlinear quantum phenomena. However, the maximum symmetry allowed for nonzero Berry curvature dipole in the transport plane is a single mirror line, which strongly limits its effects in materials. Here, via probing the nonlinear Hall effect, we demonstrate the generation of Berry curvature dipole by applied dc electric field in WTe2, which is used to break the symmetry constraint. A linear dependence between the dipole moment of Berry curvature and the dc electric field is observed. The polarization direction of the Berry curvature is controlled by the relative orientation of the electric field and crystal axis, which can be further reversed by changing the polarity of the dc field. Our Letter provides a route to generate and control Berry curvature dipole in broad material systems and to facilitate the development of nonlinear quantum devices.

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• Gate-dependent non-linear Hall effect at room temperature in topological semimetal GeTe
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• Nonlinear Hall effects with an exceptional ring
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• Enhanced nonlinear Hall effect by Cooper pairs near superconductor criticality
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• Orbital anomalous Hall effect in the few-layer Weyl semimetal TaIrTe4
• Nonlinear Valley and Spin Valves in Bilayer Graphene
• Nonlinear Hall Effects induced by Berry Curvature Dipole in CuPb${}_9$(PO${}_4$)${}_6$O
• Orbital magnetization as the origin of the nonlinear Hall effect
• Prediction of a layer nonlinear Hall effect in bilayer nonmagnetic or antiferromagnetic systems
• Electric field controlled second-order anomalous Hall effect in altermagnets
• Ferroelectric-tunable quantum nonlinearity of chiral Bloch electrons in a moiré system