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Recent Progress on the Phase Diagram of High Temperature Superconductors

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The appearance of superconductivity at high temperatures in a family of layered cuprates has been a puzzle for more than twenty years. One of their most distinguishing features is that they have a rather low density of free electrons, relative to conventional metals, which makes their high critical temperatures even more remarkable. This low carrier density is associated with many properties that differ enormously from conventional superconductors. I will review recent breakthroughs in the control over sample quality that have clarified the origin and consequences of low carrier density in YBCO , including ARPES , quantum osillations, and superfluid phase stiffness.

This talk is part of the Quantum Matter Seminar series.

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