The fact that spin current is not conserved may be bad news, but the important thing is that we know what is going on. Things may not have gone as predicted, but at least we've expanded our knowledge base in an area that we didn't know much about before.

216

You would think that since an electron carries a spin and a charge, that their motions would be equal. But, our research shows the contrary, due to a friction-like effect known as spin Coulomb drag.

124

We get a diffusion of spin because we create a situation in which there will be more spin-up electrons in one place and fewer in another.

109