在Ir-Sb二进制系统中揭示了接近蜂空隙排序的无节点非传统超导性
V Sazgari1, T P Ying2,3, J N Graham1
1PSI Center for Neutron and Muon Sciences CNM, 5232 Villigen PSI, Switzerland.
Communications physics
|November 11, 2024
概括
这项研究揭示了Ir-Sb二进制系统表现出非常规的超导性,其特点是完全缺口状态. 这一发现与有序空缺和压制的扣扣蜂空缺订单有关.
科学领域:
- 固态物理 固态物理
- 材料科学是一种材料科学.
- 凝聚物质物理学 凝聚物质物理学
背景情况:
- 相关材料中的空白未被充分探索.
- 在Ir-Sb二进制系统中,表现出曲蜂空位 (BHV) 顺序.
- 在通过高压或Rh替代抑制BHV订购时,Ir-Sb的超导性出现.
研究的目的:
- 为了研究Ir-Sb系统中的超导配对性质.
- 探索超导体中有序空缺的作用.
- 为了确定Ir-Sb中的超导是否非传统.
主要方法:
- 在Ir$_{1-x}$Sb和Ir$_{1-x}$Rh_{x}$Sb上进行了子自旋旋转实验.
- 在高压 (5.5 GPa) 和环境压力下用Rh兴奋剂合成样品.
- 超流体密度被测量为温度的函数.
主要成果:
- 高压Ir$_{1-x}$Sb和Rh-dopedIr$_{1-x}$Rh$_{x}$Sb都表现出完全间隙的超导状态,由超流体密度的指数式温度依赖表明.
- 临界温度 ($T_c$) 与超流体密度的比率表明了非常规的超导性.
- 超流体密度的显著增加与高压样本中的$T_c$相关,证实了固有的非传统超导性.
结论:
- IrSb被确定为非传统超导的第一个母阶段,有序空缺.
- 这些发现突显了Ir-Sb二进制系统中非常规超导的内在性质.
- 需要进一步的理论研究来理解观察到的现象和相位图.
关键词:
超导特性和材料的超导性.更多相关视频
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