The copper oxide family of superconductors is the only materials family we know that can superconduct above liquid Nitrogen temperatures under ambient conditions. These materials have fascinated and baffled physicists for over two decades since their discovery in 1986. While the symmetry of the superconducting state was demonstrated to be of unconventional d-wave character in 1995, the ‘normal’ state out of which superconductivity develops, and its relation to the proximate Mott insulating state continues to be a source of deep mystery.
Our research tackles the ‘normal’ state of the copper oxide superconductors by using high magnetic fields instead of high temperatures to suppress superconductivity. Our measurements of the Fermi surface of the copper oxide superconductors has revealed important insights about the mysterious ‘normal’ state.
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