Nearly 40 years after the discovery of cuprate high-temperature superconductors, the key mechanism behind their superconductivity at relatively high temperatures remains one of the most important unsolved problems in physics. An international research team including Chung-Yu Mou, Dean of the College of Science at National Tsing Hua University (NTHU) in Taiwan, has provided the first definitive evidence of a quantum critical point (QCP) in the complicated phase diagram of high-temperature cuprate superconductors—a point long obscured by the superconducting state. The team also clarified how the material’s quantum states change on either side of this critical point.
Dean Mou said these findings offer a clearer picture of the complicated phase diagram of high-temperature superconductors and provide an important benchmark for testing theoretical models. The results have been published in the prestigious international journal Nature Communications.
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