Possible Meissner effect near room temperature in copper-substituted lead apatite
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Possible Meissner effect near room temperature in copper-substituted lead apatite
Hongyang Wang, Yao Yao, Ke Shi, Yijing Zhao, Hao Wu, Zhixing Wu, Zhihui Geng, Shufeng Ye, Ning Chen
AbstractWith copper-substituted lead apatite below room temperature, we observe diamagnetic dc magnetization under magnetic field of 25 Oe with remarkable bifurcation between zero-field-cooling and field-cooling measurements, and under 200 Oe it changes to be paramagnetism. A glassy memory effect is found during cooling. Typical hysteresis loops for superconductors are detected below 250 K, along with an asymmetry between forward and backward sweep of magnetic field. Our experiment suggests at room temperature the Meissner effect is possibly present in this material.