Collective Resonance of Superconducting/Normal Domain Walls in the Intermediate State of type-I superconductor
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arXiv
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| Autori principali: | , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866913045195784192 |
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| author | Yuan, Mengju Zhang, Yugang Zhu, Ying Gao, Jingchun Wang, Aifeng He, Mingquan Ge, Jun-Yi Chai, Yisheng |
| author_facet | Yuan, Mengju Zhang, Yugang Zhu, Ying Gao, Jingchun Wang, Aifeng He, Mingquan Ge, Jun-Yi Chai, Yisheng |
| contents | The dynamics of phase boundaries, such as superconducting/normal (S/N) interfaces in type-I superconductors, are typically obscured in conventional magnetic measurements, which are dominated by surface barriers and over-damped flux processes. Here, we employ ac magnetostriction as a sensitive probe to reveal the distinct bulk dynamics of these domain walls in the intermediate state of lead. In contrast to the Debye-type relaxation observed in magnetic susceptibility, we discover a pronounced quasiresonant response characterized by a sign reversal of the imaginary component and a non-monotonic evolution of the real part with frequency. We attribute this behavior to the collective oscillations of S/N interfaces driven by eddy currents generated within the normal domains. This work uncovers a fundamental dynamical channel in superconducting modulated phases and establishes ac magnetostrictive coefficient as a powerful tool for probing hidden interface physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2604_17333 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Collective Resonance of Superconducting/Normal Domain Walls in the Intermediate State of type-I superconductor Yuan, Mengju Zhang, Yugang Zhu, Ying Gao, Jingchun Wang, Aifeng He, Mingquan Ge, Jun-Yi Chai, Yisheng Superconductivity The dynamics of phase boundaries, such as superconducting/normal (S/N) interfaces in type-I superconductors, are typically obscured in conventional magnetic measurements, which are dominated by surface barriers and over-damped flux processes. Here, we employ ac magnetostriction as a sensitive probe to reveal the distinct bulk dynamics of these domain walls in the intermediate state of lead. In contrast to the Debye-type relaxation observed in magnetic susceptibility, we discover a pronounced quasiresonant response characterized by a sign reversal of the imaginary component and a non-monotonic evolution of the real part with frequency. We attribute this behavior to the collective oscillations of S/N interfaces driven by eddy currents generated within the normal domains. This work uncovers a fundamental dynamical channel in superconducting modulated phases and establishes ac magnetostrictive coefficient as a powerful tool for probing hidden interface physics. |
| title | Collective Resonance of Superconducting/Normal Domain Walls in the Intermediate State of type-I superconductor |
| topic | Superconductivity |
| url | https://arxiv.org/abs/2604.17333 |