Tunneling anisotropic spin galvanic effect
Abstract
We show that pure spin injection from a magnetic electrode into an inversion symmetry-broken system composed of a tunnelling barrier and a metallic region generates a transverse charge current. Such a tunnelling spin galvanic conversion is non-local and may be strongly anisotropic even in linear response, contrary to what happens in bulk conversion setups lacking tunnelling elements. This is particularly relevant for spin-charge conversion at oxide interfaces, where both the tunnel barrier and the receiving low-dimensional metallic system host effective spin-orbit fields with complex angular symmetries.
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