Oh, if it’s true that aluminum alone has this local minimum issue, then the paper is even weaker than I initially thought. I took them at their word when they s

Oh, if it’s true that aluminum alone has this local minimum issue, then the paper is even weaker than I initially thought. I took them at their word when they said other shielding may have better coefficients but still suffers from the same general limitation, but your paper makes it sound like that’s a false (but commonly accepted) assumption.