通过CaH2退火法将Bi2Sr2CaCu2O8+δ连续掺杂为电子掺杂超导体
超导电性
2022-06-27 v1
摘要
作为典型的空穴掺杂铜基超导体，Bi2Sr2CaCu2O8+δ (Bi2212)的载流子掺杂主要由其氧含量决定。传统掺杂方法可将其掺杂水平调节在空穴掺杂范围内。本文报道了CaH2退火法在调节Bi2212掺杂水平中的首次应用。通过连续控制退火时间，可获得一系列不同掺杂的样品。x射线衍射、扫描透射电子显微镜、电阻与霍尔测量的综合实验结果表明，CaH2诱导的拓扑化学反应能在极宽范围内有效改变Bi2212的氧含量，甚至从空穴掺杂转变为电子掺杂。我们还在电子掺杂侧发现了低Tc超导相的证据。
引用
@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}
}
备注
7pages,3 figures and Supplementary Material 3pages,3 figures