Abstract
We present a switching mechanism that utilizes the proximity coupling between the surface spin texture
of a Weyl semimetal and a superconductor in a Weyl semimetal-superconductor Weyl semimetal trilayer
heterostructure. We show that the superconductivity in the middle layer can be fully suppressed by the surface
spin texture of the Weyl semimetals in the presence of an external magnetic field, but it can be recovered again
by only changing the field direction. The restoration of the middle-layer superconductivity indicates a sharp
transition to a low-resistance state. This sharp switching effect, realizable using a Weyl semimetal because of its
strong spin-momentum locking and surface spin polarization, is a promising avenue for novel superconducting
spin-valve applications.
