高温超导体电子态相图的新认识

简要介绍了高温超导体的电子态相图及最近的一些发展，通过测量高温超导体的抗磁信号，发现在过掺杂的高温超导体中存在着抗磁信号的第二个异常转变，分析发现这个转变可能对应着超导畴之间的耦合场，从而推论高温超导体在过掺杂区可能存在着电荷在介观尺度或宏观尺度上的不均匀，结合国际上非弹性中子散射的数据和超流电子密度的数据，文章作者第一次对电子态相图提出了一个自治的解释，这个结果如果得到其他方面的进一步验证，将对高温超导体机理的理解和更完善模型的建立起到重要指导作用。

NEW UNDERSTANDING OF THE ELECTRONIC PHASE DIAGRAM OF HIGH TEMPERATURE SUPERCONDUCTORS

Recent developments concerning the electronic phase diagram of high temperature superconductors(HTS) are presented. By measuring the diamagnetic superconducting signal, an unexpected second transition on the M(T) curve was observed in several types of overdoped HTS. Further analyses reveal that this is probably related to the coupling between superconducting clusters which are resulted from mesoscopic or macroscopic electronic phase separation in overdoped regime. To interpret the electronic phase diagram of HTS, we propose for the first time a picture that explains both the inelastic neutron scattering data and the superfluidity data. Our model, if further verified by other experiments, will certainly provide a useful guidance for theoreticians to establish a final model for HTS.