{"title":"相邻非超导层对非均质超导层临界参数的影响","authors":"P. I. Bezotosnyi, K. A. Dmitrieva","doi":"10.3103/S1068335623600407","DOIUrl":null,"url":null,"abstract":"<p>The paper describes a method for calculating critical parameters of an inhomogeneous superconducting layer surrounded by nonsuperconducting layers. The calculation is performed using Ginzburg‒Landau equations modified for a thickness-inhomogeneous superconducting layer. The effect of adjacent nonsuperconducting layers is specified using general boundary conditions to these equations. Dependences of the critical current of a superconducting layer on the external magnetic field is calculated numerically. It is shown that for a layer of inhomogeneous thickness, in the model of which the effect of adjacent layers is introduced, an estimate of the critical current yields lower values than those for a homogeneous layer without any influence of boundaries. It is found that at a certain value of the external magnetic field, the critical current is independent of the degree of the superconducting layer inhomogeneity. In this case, the influence of adjacent layers on its superconducting state does not lead to a significant change in the value of this field.</p>","PeriodicalId":503,"journal":{"name":"Bulletin of the Lebedev Physics Institute","volume":null,"pages":null},"PeriodicalIF":0.6000,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Influence of Adjacent Nonsuperconducting Layers on Critical Parameters of an Inhomogeneous Superconducting Layer\",\"authors\":\"P. I. Bezotosnyi, K. A. Dmitrieva\",\"doi\":\"10.3103/S1068335623600407\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The paper describes a method for calculating critical parameters of an inhomogeneous superconducting layer surrounded by nonsuperconducting layers. The calculation is performed using Ginzburg‒Landau equations modified for a thickness-inhomogeneous superconducting layer. The effect of adjacent nonsuperconducting layers is specified using general boundary conditions to these equations. Dependences of the critical current of a superconducting layer on the external magnetic field is calculated numerically. It is shown that for a layer of inhomogeneous thickness, in the model of which the effect of adjacent layers is introduced, an estimate of the critical current yields lower values than those for a homogeneous layer without any influence of boundaries. It is found that at a certain value of the external magnetic field, the critical current is independent of the degree of the superconducting layer inhomogeneity. In this case, the influence of adjacent layers on its superconducting state does not lead to a significant change in the value of this field.</p>\",\"PeriodicalId\":503,\"journal\":{\"name\":\"Bulletin of the Lebedev Physics Institute\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2024-04-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Bulletin of the Lebedev Physics Institute\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.3103/S1068335623600407\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Bulletin of the Lebedev Physics Institute","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.3103/S1068335623600407","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}
Influence of Adjacent Nonsuperconducting Layers on Critical Parameters of an Inhomogeneous Superconducting Layer
The paper describes a method for calculating critical parameters of an inhomogeneous superconducting layer surrounded by nonsuperconducting layers. The calculation is performed using Ginzburg‒Landau equations modified for a thickness-inhomogeneous superconducting layer. The effect of adjacent nonsuperconducting layers is specified using general boundary conditions to these equations. Dependences of the critical current of a superconducting layer on the external magnetic field is calculated numerically. It is shown that for a layer of inhomogeneous thickness, in the model of which the effect of adjacent layers is introduced, an estimate of the critical current yields lower values than those for a homogeneous layer without any influence of boundaries. It is found that at a certain value of the external magnetic field, the critical current is independent of the degree of the superconducting layer inhomogeneity. In this case, the influence of adjacent layers on its superconducting state does not lead to a significant change in the value of this field.
期刊介绍:
Bulletin of the Lebedev Physics Institute is an international peer reviewed journal that publishes results of new original experimental and theoretical studies on all topics of physics: theoretical physics; atomic and molecular physics; nuclear physics; optics; lasers; condensed matter; physics of solids; biophysics, and others.