Superconducting Energy Gap Structure of CsV3Sb5from Magnetic Penetration Depth Measurements.

IF 2.3 4区 物理与天体物理 Q3 PHYSICS, CONDENSED MATTER
Morgan James Grant, Yi Liu, Guanghan Cao, Joseph Alec Wilcox, Yanfeng Guo, Xiaofeng Xu, Antony Carrington
{"title":"Superconducting Energy Gap Structure of CsV<sub>3</sub>Sb<sub>5</sub>from Magnetic Penetration Depth Measurements.","authors":"Morgan James Grant, Yi Liu, Guanghan Cao, Joseph Alec Wilcox, Yanfeng Guo, Xiaofeng Xu, Antony Carrington","doi":"10.1088/1361-648X/ad8d2b","DOIUrl":null,"url":null,"abstract":"<p><p>Experimental determination of the structure of the superconducting order parameter in the kagome lattice compound CsV<sub>3</sub>Sb<sub>5</sub>is an essential step towards understanding the nature of the superconducting pairing in this material. Here we report measurements of the temperature dependence of the in-plane magnetic penetration depth, λ(<i>T</i>), in crystals of CsV<sub>3</sub>Sb<sub>5</sub>down to ∼ 60 mK. We find that λ(<i>T</i>) is consistent with a fully-gapped state but with significant gap anisotropy. The magnitude of the gap minima obtained are 0.16<i>k</i><sub>B</sub><i>T</i><sub>c</sub>and 0.21<i>k</i><sub>B</sub><i>T</i><sub>c</sub>for the measured samples, markedly smaller than previous estimates. We discuss different forms of potential anisotropy and how these can be linked to the V and Sb Fermi surface sheets. We highlight a significant discrepancy between the calculated and measured values of λ(<i>T</i>=0) which we suggest is caused by spatially suppressed superconductivity.</p>","PeriodicalId":16776,"journal":{"name":"Journal of Physics: Condensed Matter","volume":null,"pages":null},"PeriodicalIF":2.3000,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Physics: Condensed Matter","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1088/1361-648X/ad8d2b","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, CONDENSED MATTER","Score":null,"Total":0}
引用次数: 0

Abstract

Experimental determination of the structure of the superconducting order parameter in the kagome lattice compound CsV3Sb5is an essential step towards understanding the nature of the superconducting pairing in this material. Here we report measurements of the temperature dependence of the in-plane magnetic penetration depth, λ(T), in crystals of CsV3Sb5down to ∼ 60 mK. We find that λ(T) is consistent with a fully-gapped state but with significant gap anisotropy. The magnitude of the gap minima obtained are 0.16kBTcand 0.21kBTcfor the measured samples, markedly smaller than previous estimates. We discuss different forms of potential anisotropy and how these can be linked to the V and Sb Fermi surface sheets. We highlight a significant discrepancy between the calculated and measured values of λ(T=0) which we suggest is caused by spatially suppressed superconductivity.

从磁穿透深度测量看 CsV3Sb5 的超导能隙结构
通过实验确定神户晶格化合物 CsV3Sb5 中超导阶次参数的结构,是了解这种材料中超导配对性质的关键一步。在此,我们报告了对 CsV3Sb5 晶体中面内磁穿透深度 λ(T) 的温度依赖性的测量结果,测量值低至 ∼ 60 mK。我们发现,λ(T) 与完全隙态一致,但具有显著的间隙各向异性。在测量样品中得到的间隙最小值分别为 0.16kBTc 和 0.21kBTc,明显小于之前的估计值。我们讨论了电位各向异性的不同形式,以及如何将它们与 V 和 Sb 费米面片联系起来。我们强调了 λ(T=0) 的计算值和测量值之间的显著差异,并认为这是空间抑制超导性造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Physics: Condensed Matter
Journal of Physics: Condensed Matter 物理-物理:凝聚态物理
CiteScore
5.30
自引率
7.40%
发文量
1288
审稿时长
2.1 months
期刊介绍: Journal of Physics: Condensed Matter covers the whole of condensed matter physics including soft condensed matter and nanostructures. Papers may report experimental, theoretical and simulation studies. Note that papers must contain fundamental condensed matter science: papers reporting methods of materials preparation or properties of materials without novel condensed matter content will not be accepted.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信