A physicist whose work addresses high-temperature superconductivity and the pseudogap. His 2005 perspective with colleagues examines why a depletion of low-energy electronic states can appear above the temperature where superconductivity begins. Determining whether this behavior assists pairing, competes with it, or signals a distinct phase is essential to interpreting the normal state from which superconductivity develops. The article presents these alternatives as unresolved physical questions.[ref]
The pseudogap: friend or foe of high Tc? by Michael R. Norman and others. Abstract and introduction: pseudogap above the transition, uncertain microscopic origin and relationship to superconductivity
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