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摘要

铜氧化物超导体和铁基高温超导体是已知的两类高温超导体, 研究高温超导机理是如今超导领域最具有挑战性的前沿课题. 构建高温超导的高维精确相图、寻找决定超导转变温度的关键物理量可以为高温超导机理做好实验铺垫. 对于铜氧化物高温超导体, 多种自由度的相互关联与耦合使其相图呈现出复杂性与多样性. 现有的研究方法在构建高维“全息”相图及获取定量化物理规律等方面面临着难以克服的困难, 而材料的高通量制备与表征技术可以在相图空间实现参量的线扫描甚至面扫描, 有望快速建立可靠的高温超导高维相图和高温超导关键参量数据库, 并从中提取重要的统计物理规律. 本文从阳离子掺杂、母体氧掺杂、双电层晶体管(静电场/电化学)、磁场等几个调控维度, 回顾了主要基于输运手段获得的铜氧化物电子态相图, 介绍了基于脉冲激光沉积技术和分子束外延技术的组合薄膜生长方法以及与之匹配的跨尺度选区输运测量技术, 展示了高通量技术在高温超导研究中的初步应用. 高通量实验技术与超导研究结合, 逐步形成了新兴的高通量超导研究范式, 将在构建高维精确相图、突破高温超导机理、推进超导材料实用化等方面发挥不可替代的作用.

关键词:

Abstract

Cuprate and iron-based superconductors are known as the only two types of high- T _csuperconductors. The mechanism of high- T _csuperconductivity is the most challenging issue in the field. Building accurate high-dimensional phase diagram and exploring key parameters that determine T _c, would be essential to the comprehension of high- T _cmechanism. The electronic phase diagrams of cuprate superconductors show complexity and diversity, for the strong coupling and interplay among lattice, orbital, charge and spin degrees of freedom. It is tough to construct a high-dimensional holographic phase diagram and obtain quantitative laws by traditional research methods. Fortunately, the high-throughput synthesis and fast screening techniques enable to probe the phase diagram via line-by-line or map scanning modes, and thereby are expected to obtain high-dimensional phase diagram and key superconducting parameters in a much efficient way. In this article, electronic phase diagrams of cuprate superconductors that are obtained mainly by electrical transport measurements, are briefly summarized in the view of cation substitutions, oxygen variation in the parent compounds, electric double-layer gating (electrostatic/electrochemical manipulation) and magnetic field. We introduce the preparation methods for combinatorial film based on the developed pulsed laser deposition and oxide molecular beam epitaxy techniques, as well as corresponding scale-span high-throughput measurement techniques. These high-throughput techniques have been successfully applied in the research of interface superconductivity, quantum phase transition, and so on. The novel high-throughput superconductivity research mode will play an indispensable role in the construction of the high-dimensional holographic phase diagram, the comprehension of high- T _cmechanism, and practical applications of superconductors.

Keywords:

作者及机构信息

金魁^1,2,3,
吴颉^4,5

1.
2.
3.
4.
5.

通信作者:金魁,kuijin@iphy.ac.cn; 吴颉,wujie@westlake.edu.cn

基金项目:国家重点基础研究发展计划(批准号: 2016YFA0300301, 2017YFA0302902, 2017YFA0303003, 2018YFB0704102)、国家自然科学基金(批准号: 11674374, 11834016)、中国科学院战略性先导科技专项(B类)(批准号: XDB25000000)、中国科学院前沿重点项目(批准号: QYZDJ-SSW-SLH001, QYZDB-SSW-SLH008, QYZDY-SSW-SLH001)、北京自然科学基金(批准号: Z190008)和中国科学院创新交叉团队资助的课题

Authors and contacts

Jin Kui^1,2,3,
Wu Jie^4,5

1.
2.
3.
4.
5.

Corresponding author:Jin Kui,kuijin@iphy.ac.cn; Wu Jie,wujie@westlake.edu.cn

Funds:Project supported by the National Basic Research Program of China (Grant Nos. 2016YFA0300301, 2017YFA0302902, 2017YFA0303003, 2018YFB0704102), the National Natural Science Foundation of China (Grant Nos. 11674374, 11834016), the Strategic Priority Research Program of Chinese Academy of Sciences, China (Grant No. XDB25000000), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences, China (Grant Nos. QYZDJ-SSW-SLH001, QYZDB-SSW-SLH008, QYZDY-SSW-SLH001), the Natural Science Foundation of Beijing, China (Grant No. Z190008), and Interdisciplinary Innovation Team of Chinese Academy of Sciences, China

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施引文献

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

下载: 全尺寸图片幻灯片

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