我国科学家创造镍基超导体转变温度新纪录

Core Insights - The article highlights the achievement of Chinese scientists in developing a new nickel-based superconductor, setting a record for the highest superconducting transition temperature in this category of materials [1][2]. Group 1: Superconductivity Breakthrough - The newly developed superconductor belongs to the nickelate system, marking it as the third type of unconventional high-temperature superconductor after cuprates and iron-based superconductors [1]. - The research team utilized a novel method called the ambient pressure solvent method to synthesize high-quality nickelate crystals, resulting in purer and more uniform structures [1]. - The single crystal samples produced have high quality, laying a solid foundation for studying their superconducting properties [1]. Group 2: Measurement Challenges and Innovations - Determining whether materials are superconducting under high-pressure conditions is highly challenging, requiring the assessment of two properties: zero resistance and complete diamagnetism [2]. - The research team developed innovative techniques for hydrostatic pressure resistance and magnetic measurement, enabling the preservation of the single crystal's structural integrity and intrinsic properties under extreme conditions [2]. - The nickelate sample confirmed as a superconductor has a transition temperature of 96K (-177.15°C), marking a significant advancement towards achieving superconductivity near room temperature [2].