In many ways this is the core of good science. "Hey, this seems unusual." followed by "Here is a theory, and a hypothesis with a prediction of this theory is what is going on" then "Here is an experiment to test that hypothesis with all the ways we can think of that might mess up the answer compensated for." and then "Here are the results of the experiment." At which point other labs can go do the same experiment and see if they get the same results, and if so they can try to screw with those results in ways that they believe invalidate the theory, until everyone can reproduce the canonical experiment and on remaining theory agrees with the evidence produced by the experiments.
That said, nothing I saw in the paper suggested it would be expensive to reproduce this effect. The palladium is pricey but you don't apparently need very much and the fabrication, as described, it pretty standard semiconductor fabrication steps. Feature size is pretty large compared to modern processes so you wouldn't need a state of the art fab to make a wafer of these things.
That said, nothing I saw in the paper suggested it would be expensive to reproduce this effect. The palladium is pricey but you don't apparently need very much and the fabrication, as described, it pretty standard semiconductor fabrication steps. Feature size is pretty large compared to modern processes so you wouldn't need a state of the art fab to make a wafer of these things.