  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.
