Enhancement of the critical current by surface irregularities in Fe-based superconductors
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arXiv
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| Auteurs principaux: | , , , , |
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| Format: | Preprint |
| Publié: |
2024
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| _version_ | 1866910620575596544 |
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| author | Llovo, I. F. Mosqueira, J. Hu, Ding Luo, Huiqian Li, Shiliang |
| author_facet | Llovo, I. F. Mosqueira, J. Hu, Ding Luo, Huiqian Li, Shiliang |
| contents | The critical current $I_c$ of single crystals of the iron pnictide superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$, has been studied through measurements of magnetic hysteresis cycles. We show that the introduction of surface irregularities in the $μ$m scale significantly increase $I_c$, primarily near the irreversibility magnetic field $H_{irr}$, where the surface currents are the main contribution to $I_c$. Such an increase is consistent with a theoretical estimate for the maximum non-dissipative current that a rough surface can sustain, based on Mathieu-Simon continuum theory for the vortex state. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_12933 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Enhancement of the critical current by surface irregularities in Fe-based superconductors Llovo, I. F. Mosqueira, J. Hu, Ding Luo, Huiqian Li, Shiliang Superconductivity The critical current $I_c$ of single crystals of the iron pnictide superconductor BaFe$_2$(As$_{1-x}$P$_x$)$_2$, has been studied through measurements of magnetic hysteresis cycles. We show that the introduction of surface irregularities in the $μ$m scale significantly increase $I_c$, primarily near the irreversibility magnetic field $H_{irr}$, where the surface currents are the main contribution to $I_c$. Such an increase is consistent with a theoretical estimate for the maximum non-dissipative current that a rough surface can sustain, based on Mathieu-Simon continuum theory for the vortex state. |
| title | Enhancement of the critical current by surface irregularities in Fe-based superconductors |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2402.12933 |