  Electrical transport in non-centrosymmetric materials departs from the
well-established phenomenological Ohm's law. Instead of a linear relation
between current and electric field, a non-linear conductivity emerges along
specific crystallographic directions. This non-linear transport is
fundamentally related to the lack of spatial inversion symmetry. However, the
experimental implications of an inversion symmetry operation on the non-linear
conductivity remain to be explored. Here, we report on a large, non-linear
conductivity in chiral Tellurium. By measuring samples with opposite
handedness, we demonstrate that the non-linear transport is odd under spatial
inversion. Furthermore, by applying an electrostatic gate, we modulate the
non-linear output by a factor of 300, reaching the highest reported value
excluding engineered heterostructures. Our results establish chiral Te as an
ideal compound not just to study the fundamental interplay between crystal
structure, symmetry operations and non-linear transport, but also to develop
wireless rectifiers and energy-harvesting chiral devices.
