Critical Temperature and Order Parameter in Superconducting Heterostructures with Allowance for a Nonzero Coupling Constant in a Polydomain Ferromagnet

IF 1.4 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY
V. A. Tumanov, Yu. N. Proshin
{"title":"Critical Temperature and Order Parameter in Superconducting Heterostructures with Allowance for a Nonzero Coupling Constant in a Polydomain Ferromagnet","authors":"V. A. Tumanov,&nbsp;Yu. N. Proshin","doi":"10.1134/S0021364024603191","DOIUrl":null,"url":null,"abstract":"<p>The superconducting state in heterostructures containing layers of a superconductor and a ferromagnet, which is split into domains, has been studied taking into account the long-range electron–electron interaction in the ferromagnetic layer. The critical temperature and spatial distribution of the order parameter in different heterostructures have been calculated. Various types of spin valves have been examined, including a valve based on solitary reentrant superconductivity in asymmetric superconductor/superconductor/superconductor systems. A shift of the minimum has been observed in the dependence of the critical temperature of the superconductor/superconductor/superconductor system on the thickness of the ferromagnetic layer due to the presence of a domain structure. A state with alternating signs of the phase of the superconducting order parameter in one of the superconducting layers against the background of domain walls has been obtained. In superconductor/superconductor/superconductor systems, the alternation of the phase sign is also possible at the edge of one of the ferromagnetic layers because of the alternation of the magnetization direction. The possibility of using the sensitivity of the order parameter phase to magnetic inhomogeneities to create a controllable 0–π Josephson junction is discussed.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 8","pages":"608 - 615"},"PeriodicalIF":1.4000,"publicationDate":"2024-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024603191.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JETP Letters","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0021364024603191","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

The superconducting state in heterostructures containing layers of a superconductor and a ferromagnet, which is split into domains, has been studied taking into account the long-range electron–electron interaction in the ferromagnetic layer. The critical temperature and spatial distribution of the order parameter in different heterostructures have been calculated. Various types of spin valves have been examined, including a valve based on solitary reentrant superconductivity in asymmetric superconductor/superconductor/superconductor systems. A shift of the minimum has been observed in the dependence of the critical temperature of the superconductor/superconductor/superconductor system on the thickness of the ferromagnetic layer due to the presence of a domain structure. A state with alternating signs of the phase of the superconducting order parameter in one of the superconducting layers against the background of domain walls has been obtained. In superconductor/superconductor/superconductor systems, the alternation of the phase sign is also possible at the edge of one of the ferromagnetic layers because of the alternation of the magnetization direction. The possibility of using the sensitivity of the order parameter phase to magnetic inhomogeneities to create a controllable 0–π Josephson junction is discussed.

考虑多畴铁磁体非零耦合常数的超导异质结构的临界温度和序参量
考虑到铁磁层中电子-电子的远距离相互作用,研究了包含超导体和铁磁层的异质结构中的超导态。计算了不同异质结构中临界温度和序参量的空间分布。已经研究了各种类型的自旋阀,包括非对称超导体/超导体/超导体系统中基于孤立可重入超导的自旋阀。由于畴结构的存在,超导体/超导体/超导体体系的临界温度与铁磁层厚度的关系发生了最小值的变化。在畴壁背景下,得到了超导层中超导序参量相位符号交替的状态。在超导体/超导体/超导体系统中,由于磁化方向的改变,在其中一个铁磁层的边缘也可能发生相符号的改变。讨论了利用序参量相位对磁不均匀性的敏感性来创建可控的0 -π约瑟夫森结的可能性。
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
JETP Letters
JETP Letters 物理-物理:综合
CiteScore
2.40
自引率
30.80%
发文量
164
审稿时长
3-6 weeks
期刊介绍: All topics of experimental and theoretical physics including gravitation, field theory, elementary particles and nuclei, plasma, nonlinear phenomena, condensed matter, superconductivity, superfluidity, lasers, and surfaces.
×
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:604180095
Book学术官方微信