【直播】【清华大学“世纪物理情”】中科院物理所金魁 学术报告
活动名称:
Scaling of the strange-metal scattering in high-Tc superconductors
活动时间:
2022年10月5日(周三)16:00
报告嘉宾:
金魁(中国科学院物理研究所)
主办单位:
清华大学高等研究院
直播通道
蔻享学术直播间 |
报告人介绍
金魁
中国科学院物理研究所
报告简介
Soon after the discovery of cuprate superconductors, the strange-metal behavior of their normal-state resistivity was observed, namely, a linear resistivity as a function of temperature (T-linear resistivity) persisting much lower than the Debye temperature. About one decade ago, several groups unveiled an intimated correlation between the superconducting transition temperature (Tc) and the slope of the T-linear resistivity (A1). That is, these two quantities increase or decrease simultaneously. Consequently, the question the community has been after is: what connects the strength of superconductivity with electron scattering? To solve this issue, one needs to quantify the relationship between Tc and A1. However, it turns out to be a great challenge to manipulate external parameters for marked evolution of properties with minute changes. In this talk, I would like to share with you two pieces of our recent work and report on the discovery of Tc ~ A10.5 relationship in different families of high-temperature superconductors. For a cuprate system La2-xCexCuO4, we developed advanced high-throughput techniques and used a combinatorial library to map how superconducting properties and normal-state properties of the superconductor evolve with minute compositional variation (Δx) with unprecedented resolution and accuracy . We also achieved continuous evolution of superconductivity in ion-gated FeSe film via electric-field gating technique integrated with two-coil mutual inductance and electrical transport property measurements. Such relationship between Tc and A1 is at work for both systems, yet different techniques were employed to tune the superconductivity minutely. Remarkably, the scaling is seemingly satisfied also in hole-doped cuprate, as well as a class of organic superconductors via pressure tuning. This unexpected universal scale indicate
推荐阅读
【清华大学“世纪物理情”系列讲座】基于qPlus型扫描探针技术的量子态精密探测和操控 >>
【清华大学“世纪物理情”系列讲座】中科院理论物理所张潘:Computation with Tensor Networks >>
【清华大学“世纪物理情”系列讲座】清华大学段路明教授:量子计算机——现状与未来 >>
编辑:王亚琨
蔻享学术 平台介绍
蔻享学术平台,国内领先的一站式科学资源共享平台,依托国内外一流科研院所、高等院校和企业的科研力量,聚焦前沿科学,以优化科研创新环境、传播和服务科学、促进学科交叉融合为宗旨,打造优质学术资源的共享数据平台。
识别二维码,
下载 蔻享APP 查看最新资源数据。
点击阅读原文,查看更多精彩报告!