高压调控超导电性并探索新型超导体

采用金刚石对顶压砧技术，通过高压的调控手段对系列铋系铜氧化物超导体、高熵合金超导体、NbTi合金超导体，铁基超导体FeTe0.55Se0.45和ThFeAsN进行了系统的研究。获得这些超导材料的超导电性在压力下的演化以及压力下的奇异量子现象，并进一步分析影响超导电性的因素。并通过高压的调控手段对常压不超导的重费米子化合物CeRhGe3、硫族化合物3D拓扑绝缘体Bi2Te2Se和Bi1.1Sb0.9Te2S、外尔半金属材料TaIrTe4、近藤绝缘体SmB6、量子自旋液体候选材料RuCl3以及阻挫磁体SrCu2(BO3)2进行了系统的研究。发现Bi2Te2Se和Bi1.1Sb0.9Te2S两种材料中都能诱导出两个超导转变，并得到M2X3体系拓扑绝缘体具有普适的压力-超导相图，外尔半金属TaIrTe4压力下超导电性，以及SmB6霍尔系数与表面态的关联等新信，为进一步理解超导机理以及探索新型超导材料提供实验信息。

Systematic investigations were performed using the diamond anvil cell (DAC) technique and high-pressure tuning strategy on a series of superconductors, including bismuth-based copper oxide superconductors, high-entropy alloy superconductors, NbTi alloy superconductors, iron-based superconductors FeTe₀.₅₅Se₀.₄₅ and ThFeAsN. The pressure-induced evolution of superconductivity and exotic quantum phenomena in these superconducting materials were observed, and the factors affecting superconductivity were further analyzed. Additionally, systematic high-pressure tuning studies were conducted on several materials that are non-superconducting at ambient pressure, including heavy fermion compound CeRhGe₃, chalcogenide 3D topological insulators Bi₂Te₂Se and Bi₁.₁Sb₀.₉Te₂S, Weyl semimetal TaIrTe₄, Kondo insulator SmB₆, quantum spin liquid candidate RuCl₃, and frustrated magnet SrCu₂(BO₃)₂. Two superconducting transitions were successfully induced in both Bi₂Te₂Se and Bi₁.₁Sb₀.₉Te₂S. Furthermore, universal pressure-superconductivity phase diagrams for M₂X₃-type topological insulators, pressure-induced superconductivity in Weyl semimetal TaIrTe₄, and the correlation between the Hall coefficient of SmB₆ and its surface states were obtained. These new findings provide experimental insights for further understanding the superconducting mechanism and exploring novel superconducting materials.

搜集汇总

背景与挑战

背景概述

该数据集通过高压技术系统研究了多种超导材料，如铋系铜氧化物和铁基超导体，以探索超导电性在压力下的演化规律。同时，研究还涉及高压调控对非超导材料的影响，旨在发现新型超导现象并为理解超导机理提供实验依据。数据集由中国科学院物理研究所创建，包含实验数据文件。