Superheating field in superconductors with nanostructured surfaces
We report calculations of a DC superheating field Hsh in superconductors with nanostructured surfaces. Numerical simulations of the Ginzburg–Landau (GL) equations were performed for a superconductor with an inhomogeneous impurity concentration, a thin superconducting layer on top of another supercon...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2023-09-01
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| Series: | Frontiers in Electronic Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/femat.2023.1246016/full |
| _version_ | 1827161250063187968 |
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| author | W. P. M. R. Pathirana A. Gurevich |
| author_facet | W. P. M. R. Pathirana A. Gurevich |
| author_sort | W. P. M. R. Pathirana |
| collection | DOAJ |
| description | We report calculations of a DC superheating field Hsh in superconductors with nanostructured surfaces. Numerical simulations of the Ginzburg–Landau (GL) equations were performed for a superconductor with an inhomogeneous impurity concentration, a thin superconducting layer on top of another superconductor, and superconductor–insulator–superconductor (S-I-S) multilayers. The superheating field was calculated taking into account the instability of the Meissner state with a non-zero wavelength along the surface, which is essential for the realistic values of the GL parameter κ. Simulations were performed for the material parameters of Nb and Nb3Sn at different values of κ and the mean free paths. We show that the impurity concentration profile at the surface and thicknesses of S-I-S multilayers can be optimized to enhance Hsh above the bulk superheating fields of both Nb and Nb3Sn. For example, an S-I-S structure with a 90-nm-thick Nb3Sn layer on Nb can boost the superheating field up to ≈500 mT, while protecting the superconducting radio-frequency (SRF) cavity from dendritic thermomagnetic avalanches caused by local penetration of vortices. |
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| format | Article |
| id | doaj.art-415e214b575f4d0cbd95ab24c8615925 |
| institution | Directory Open Access Journal |
| issn | 2673-9895 |
| language | English |
| last_indexed | 2025-03-21T00:25:56Z |
| publishDate | 2023-09-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Electronic Materials |
| spelling | doaj.art-415e214b575f4d0cbd95ab24c86159252024-08-03T07:14:59ZengFrontiers Media S.A.Frontiers in Electronic Materials2673-98952023-09-01310.3389/femat.2023.12460161246016Superheating field in superconductors with nanostructured surfacesW. P. M. R. Pathirana0A. Gurevich1Department of Physics and Astronomy, Virginia Military Institute, Lexington, VA, United StatesDepartment of Physics and Center for Accelerator Science, Old Dominion University, Norfolk, VA, United StatesWe report calculations of a DC superheating field Hsh in superconductors with nanostructured surfaces. Numerical simulations of the Ginzburg–Landau (GL) equations were performed for a superconductor with an inhomogeneous impurity concentration, a thin superconducting layer on top of another superconductor, and superconductor–insulator–superconductor (S-I-S) multilayers. The superheating field was calculated taking into account the instability of the Meissner state with a non-zero wavelength along the surface, which is essential for the realistic values of the GL parameter κ. Simulations were performed for the material parameters of Nb and Nb3Sn at different values of κ and the mean free paths. We show that the impurity concentration profile at the surface and thicknesses of S-I-S multilayers can be optimized to enhance Hsh above the bulk superheating fields of both Nb and Nb3Sn. For example, an S-I-S structure with a 90-nm-thick Nb3Sn layer on Nb can boost the superheating field up to ≈500 mT, while protecting the superconducting radio-frequency (SRF) cavity from dendritic thermomagnetic avalanches caused by local penetration of vortices.https://www.frontiersin.org/articles/10.3389/femat.2023.1246016/fullsuperheating fieldsuperconductorsmultilayered superconductorsvorticesGinzburg–Landau theory |
| spellingShingle | W. P. M. R. Pathirana A. Gurevich Superheating field in superconductors with nanostructured surfaces Frontiers in Electronic Materials superheating field superconductors multilayered superconductors vortices Ginzburg–Landau theory |
| title | Superheating field in superconductors with nanostructured surfaces |
| title_full | Superheating field in superconductors with nanostructured surfaces |
| title_fullStr | Superheating field in superconductors with nanostructured surfaces |
| title_full_unstemmed | Superheating field in superconductors with nanostructured surfaces |
| title_short | Superheating field in superconductors with nanostructured surfaces |
| title_sort | superheating field in superconductors with nanostructured surfaces |
| topic | superheating field superconductors multilayered superconductors vortices Ginzburg–Landau theory |
| url | https://www.frontiersin.org/articles/10.3389/femat.2023.1246016/full |
| work_keys_str_mv | AT wpmrpathirana superheatingfieldinsuperconductorswithnanostructuredsurfaces AT agurevich superheatingfieldinsuperconductorswithnanostructuredsurfaces |