A. S. Usoltsev, A. T. Daniyarkhodzhaev, A. A. Gippius, A. V. Sadakov
{"title":"Superconducting Order Parameter of the RbCa2Fe4As4F2 Compound","authors":"A. S. Usoltsev, A. T. Daniyarkhodzhaev, A. A. Gippius, A. V. Sadakov","doi":"10.1134/S0021364024604445","DOIUrl":null,"url":null,"abstract":"<p>The superconducting order parameter of the RbCa<sub>2</sub>Fe<sub>4</sub>As<sub>4</sub>F<sub>2</sub> compound belonging to the new 12442 family of iron-based superconductors with a critical temperature of <i>T</i><sub>c</sub> ~ 32 K has been studied. Two superconducting condensates with the order parameters Δ<sub>L</sub> ~ 6.3 meV and Δ<sub>S</sub> ~ 2.8 meV have been detected for the first time by multiple Andreev reflection spectroscopy. The temperature dependence of the superconducting critical current density <i>J</i><sub>c</sub>(<i>T</i>) in the intrinsic field has been measured. The approximation of the dependence <i>J</i><sub>c</sub>(<i>T</i>) demonstrates the correspondence of the experimental data to the double-gap model with the <i>s</i>-wave order parameter and the gaps of Δ<sub>L</sub> ~ 6 meV and Δ<sub>S</sub> ~ 2 meV. The superconducting order parameters obtained by two different methods are in good agreement with each other.</p>","PeriodicalId":604,"journal":{"name":"JETP Letters","volume":"120 12","pages":"923 - 931"},"PeriodicalIF":1.4000,"publicationDate":"2025-02-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1134/S0021364024604445.pdf","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"JETP Letters","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0021364024604445","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 order parameter of the RbCa2Fe4As4F2 compound belonging to the new 12442 family of iron-based superconductors with a critical temperature of Tc ~ 32 K has been studied. Two superconducting condensates with the order parameters ΔL ~ 6.3 meV and ΔS ~ 2.8 meV have been detected for the first time by multiple Andreev reflection spectroscopy. The temperature dependence of the superconducting critical current density Jc(T) in the intrinsic field has been measured. The approximation of the dependence Jc(T) demonstrates the correspondence of the experimental data to the double-gap model with the s-wave order parameter and the gaps of ΔL ~ 6 meV and ΔS ~ 2 meV. The superconducting order parameters obtained by two different methods are in good agreement with each other.
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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
