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One of the main concerns in the field of condensed-matter physics is the nature of strongly interacting particles. For context, most metals are described as systems containing weakly-interacting electrons, despite electron interactions being usually strong.

In physics, the Landau Fermi liquid theory is a theoretical model that describes interacting fermions and, subsequently, the normal state of metals at low temperatures. It also helps explain how electrons interact with other electrons and get affected in return. In metals, these interactions affect and alter the metals' characteristics but supposedly have no effect on the structure of the system, remaining similar to its state when it still had free electrons.

Now, researchers from the University of Illinois, Johns Hopkins University, the City University of New York (CUNY) College of Staten Island, and the University of Colorado Boulder used a novel technique to inquire about the possibility of a "strongly disordered and highly correlated and disordered electron system" could be mapped to a system, leading to a unique phenomenon called marginal Fermi glass.

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