A selective control of volatile and non-volatile superconductivity in an insulating copper oxide via ionic liquid gating

• 作者: Alejandro V.Silhanek Anna Kusmartseva Beiyi Zhu Dong Li Feo V.Kusmartsev Hao-Bo Li Jie Yuan Jun Miao Kui Jin Li Xu Li Yu Lin Gu Mingyang Qin Oinghua Zhang Pu Yu Qihong Chen Qing Huan Tao Xiang Wei Hu Weiqiang Yu Xinjian Wei Yuan Lin
• 来源期刊: 科学通报（英文版）
• 年，卷（期）: 2020,（19）
• 页码范围: 1607-1613
• 页数: 7页
• 语种: 英文

摘要

Manipulating the superconducting states of high transition temperature (high-To) cuprate superconductors in an efficient and reliable way is of great importance for their applications in next-generation electronics.Here,employing ionic liquid gating,a selective control of volatile and non-volatile superconductivity is achieved in pristine insulating Pr2CuO4±δ (PCO) films,based on two distinct mechanisms.Firstly,with positive electric fields,the film can be reversibly switched between superconducting and non-superconducting states,attributed to the carrier doping effect.Secondly,the film becomes more resistive by applying negative bias voltage up to-4 V,but strikingly,a non-volatile superconductivity is achieved once the gate voltage is removed.Such phenomenon represents a distinctive route of manipulating superconductivity in PCO,resulting from the doping healing of oxygen vacancies in copper-oxygen planes as unravelled by high-resolution scanning transmission electron microscope and in situ X-ray diffraction experiments.The effective manipulation of volatile/non-volatile superconductivity in the same parent cuprate brings more functionalities to superconducting electronics,as well as supplies flexible samples for investigating the nature of quantum phase transitions in high-Tc superconductors.