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The charged current interaction is one of the ways in which subatomic particles can interact by means of the weak force. It is mediated by the W⁺ and W⁻ bosons. The interaction is called 'charged' because the W bosons coupling to the charged currents must have electric charge. The charged current that gives the interaction its name is that of the interacting particles, in a charged combination. For example, the charged-current contribution to the νₑe⁻ → νₑe⁻ elastic scattering amplitude 𝔐CC∝Jμ⁽CC⁾(e⁻→νₑ) J⁽CC⁾μ(νₑ→e⁻) where the charged currents describing the flow of one fermion into the other are given by J⁽CC⁾µ(f→fʼ)=ūfʼγμ1/2(1-γ⁵)uf.
A method for realizing spin-orbital moment driven magnetic moment flip based on interface spin vorticity coupling effect
The application belongs to the technical field of spintronics, and specifically forms a vortex of electron drift velocity at the interface of a magnetic layer and a metal layer by a difference in conductivity, further utilizes a spin vortex coupling effect to realize conversion of charge current to spin current, and thereby drives a magnetic moment to flip through a spin-orbit moment. As an example, the application deposits a Cu layer with high conductivity on a PtCo alloy layer with lower conductivity through magnetron sputtering, and constructs a heterostructure with a PtCo / Cu interface spin vortex coupling effect. By increasing the thickness of the Cu layer to improve the conductivity of the Cu layer, a significant improvement in the orbital moment efficiency can be observed. Not only does this provide valuable experimental evidence for in-depth understanding of the physical mechanism of interface-induced spin current, but also enriches the conversion approach between charge current and spin current, and opens up a simple and efficient new path for the research and design of a new generation of spintronic devices.
Owner:UNIV OF JINAN