Observing unconventional superconductivity via kinetic inductance in Weyl semimetal MoTe$_2$
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866917177937887232 |
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| author | Kreidel, Mary Ingham, Julian Chu, Xuanjing Balgley, Jesse Chung, Ted S. Antony, Abhinandan Verma, Nishchhal Holtzman, Luke N. Barmak, Katayun Queiroz, Raquel Hone, James Westervelt, Robert M. Fong, Kin Chung |
| author_facet | Kreidel, Mary Ingham, Julian Chu, Xuanjing Balgley, Jesse Chung, Ted S. Antony, Abhinandan Verma, Nishchhal Holtzman, Luke N. Barmak, Katayun Queiroz, Raquel Hone, James Westervelt, Robert M. Fong, Kin Chung |
| contents | Identifying the pairing symmetry of unconventional superconductors plays an essential role in the ongoing quest to understand correlated electronic matter. A long-standing approach is to study the temperature dependence of the London penetration depth $λ$ for evidence of nodal points where the superconducting gap vanishes. However, experimental reports can be ambiguous due to the requisite low-temperature resolution, and the similarity in signatures of nodal quasiparticles and impurity states. Here we study the pairing symmetry of Weyl semimetal $T_d$-MoTe$_2$, where previous measurements of $λ$ have yielded conflicting results. We utilize a novel technique based on a microwave resontor to measure the kinetic inductance of MoTe$_2$, which is directly related to $λ$. The high precision of this technique allows us to observe power-law temperature dependence of $λ$, and to measure the anomalous nonlinear Meissner effect -- the current dependence of $λ$ arising from nodal quasiparticles. Together, these measurements provide smoking gun signatures of nodal superconductivity. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_24671 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Observing unconventional superconductivity via kinetic inductance in Weyl semimetal MoTe$_2$ Kreidel, Mary Ingham, Julian Chu, Xuanjing Balgley, Jesse Chung, Ted S. Antony, Abhinandan Verma, Nishchhal Holtzman, Luke N. Barmak, Katayun Queiroz, Raquel Hone, James Westervelt, Robert M. Fong, Kin Chung Superconductivity Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons Identifying the pairing symmetry of unconventional superconductors plays an essential role in the ongoing quest to understand correlated electronic matter. A long-standing approach is to study the temperature dependence of the London penetration depth $λ$ for evidence of nodal points where the superconducting gap vanishes. However, experimental reports can be ambiguous due to the requisite low-temperature resolution, and the similarity in signatures of nodal quasiparticles and impurity states. Here we study the pairing symmetry of Weyl semimetal $T_d$-MoTe$_2$, where previous measurements of $λ$ have yielded conflicting results. We utilize a novel technique based on a microwave resontor to measure the kinetic inductance of MoTe$_2$, which is directly related to $λ$. The high precision of this technique allows us to observe power-law temperature dependence of $λ$, and to measure the anomalous nonlinear Meissner effect -- the current dependence of $λ$ arising from nodal quasiparticles. Together, these measurements provide smoking gun signatures of nodal superconductivity. |
| title | Observing unconventional superconductivity via kinetic inductance in Weyl semimetal MoTe$_2$ |
| topic | Superconductivity Mesoscale and Nanoscale Physics Materials Science Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2512.24671 |