Hubbard found the model to be the simplest that produces both a metallic and an insulating state, depending on the value of U. (Incidentally, the commonly known 'Hubbard U ' was actually called ' I ' ...
In a recent study, the Hubbard model was unable to predict the behavior of a simplified, one-dimensional cuprate system. SLAC scientists say the model is unlikely to fully explain high-temperature ...
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