As a typical hole-doped cuprate superconductor, Bi 2 Sr 2 CaCu 2 O 8+{\delta} (Bi2212) carrier doping is mostly determined by its oxygen content. Traditional doping methods can regulate its doping level within the range of hole doping. Here we report the first application of CaH 2 annealing method in regulating the doping level of Bi2212. By continuously controlling the anneal time, a series of differently doped samples can be obtained. The combined experimental results of x-ray diffraction, scanning transmission electron microscopy, resistance and Hall measurements demonstrate that the CaH 2 induced topochemical reaction can effectively change the oxygen content of Bi2212 within a very wide range, even switching from hole doping to electron doping. We also found evidence of a low-T c superconducting phase in the electron doping side.
@article{arxiv.2206.11712,
title = {Continuously Doping Bi 2 Sr 2 CaCu 2 O 8+{\delta} into Electron-Doped Superconductor by CaH 2 Annealing Method},
author = {Jin Zhao and Yu-Lin Gan and Guang Yang and Yi-Gui Zhong and Cen-Yao Tang and Fa-Zhi Yang and Giao Ngoc Phan and Qiang-Tao Sui and Zhong Liu and Gang Li and Xiang-Gang Qiu and Qing-Hua Zhang and Jie Shen and Tian Qian and Li Lu and Lei Yan and Gen-Da Gu and Hong Ding},
journal= {arXiv preprint arXiv:2206.11712},
year = {2022}
}
Comments
7pages,3 figures and Supplementary Material 3pages,3 figures