STM studies on magnetic field induced electronic charge order

在本研究项目中，我们在一个典型的高T_c铜酸盐Bi2212中进行了磁场下的STM/STS实验和泵浦-探测光学实验，以阐明伴随赝隙的电子电荷有序的起源及其与高T_c超导电性的关系。STM/STS实验表明，电子的电荷顺序可以用电荷-自旋条纹模型来理解，并且在本质上是动态起伏的。此外，在泵浦-探测光学实验中，还发现电子的电荷有序和赝隙不仅与高温超导竞争，而且是必需的。利用这些结果，我们指出，起伏条纹是形成高T_c超导电性的原因。

In this research project, we performed STM/STS experiments under magnetic fields and pump-probe optical experiments in one of the typical high-Tc cuprates Bi2212 to clarify the origin of the electronic charge order accompanied by a pseudogap and its relation to the high-Tc superconductivity. STM/STS experiments suggested that the electronic charge order will be understood in terms of the charge-spin stripes model, and dynamically fluctuating in nature. In pump-probe optical experiments, furthermore, it was found that the electronic charge order and pseudogap do not only compete with but also is needed for the high-Tc superconductivity. Employing these results, we pointed out that the fluctuating stripes would be responsible for the formation of high-Tc superconductivity.