Contactless cavity sensing of superfluid stiffness in atomically thin 4Hb-TaS$_2$
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arXiv
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| Autores principales: | , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866914121746743296 |
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| author | Chistolini, Trevor Kim, Ha-Leem Wang, Qiyu Chen, Su-Di Cairns, Luke Pritchard Day, Ryan Patrick Sanborn, Collin Kim, Hyunseong Pedramrazi, Zahra Qi, Ruishi Taniguchi, Takashi Watanabe, Kenji Analytis, James G. Santiago, David I. Siddiqi, Irfan Wang, Feng |
| author_facet | Chistolini, Trevor Kim, Ha-Leem Wang, Qiyu Chen, Su-Di Cairns, Luke Pritchard Day, Ryan Patrick Sanborn, Collin Kim, Hyunseong Pedramrazi, Zahra Qi, Ruishi Taniguchi, Takashi Watanabe, Kenji Analytis, James G. Santiago, David I. Siddiqi, Irfan Wang, Feng |
| contents | The exceptional tunability of two-dimensional van der Waals materials offers unique opportunities for exploring novel superconducting phases. However, in such systems, the measurement of superfluid phase stiffness, a fundamental property of a superconductor, is challenging because of the mesoscopic sample size. Here, we introduce a contact-free technique for probing the electrodynamic response, and thereby the phase stiffness, of atomically thin superconductors using on-chip superconducting microwave resonators. We demonstrate this technique on 4Hb-TaS$_2$, a van der Waals superconductor whose gap structure under broken mirror symmetry is under debate. In our cleanest few-layer device, we observe a superconducting critical temperature comparable to that of the bulk. The temperature evolution of the phase stiffness features nodeless behavior in the presence of broken mirror symmetry, inconsistent with the scenario of nodal surface superconductivity. With minimal fabrication requirements, our technique enables microwave measurements across wide ranges of two-dimensional superconductors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_25124 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Contactless cavity sensing of superfluid stiffness in atomically thin 4Hb-TaS$_2$ Chistolini, Trevor Kim, Ha-Leem Wang, Qiyu Chen, Su-Di Cairns, Luke Pritchard Day, Ryan Patrick Sanborn, Collin Kim, Hyunseong Pedramrazi, Zahra Qi, Ruishi Taniguchi, Takashi Watanabe, Kenji Analytis, James G. Santiago, David I. Siddiqi, Irfan Wang, Feng Superconductivity Mesoscale and Nanoscale Physics Strongly Correlated Electrons The exceptional tunability of two-dimensional van der Waals materials offers unique opportunities for exploring novel superconducting phases. However, in such systems, the measurement of superfluid phase stiffness, a fundamental property of a superconductor, is challenging because of the mesoscopic sample size. Here, we introduce a contact-free technique for probing the electrodynamic response, and thereby the phase stiffness, of atomically thin superconductors using on-chip superconducting microwave resonators. We demonstrate this technique on 4Hb-TaS$_2$, a van der Waals superconductor whose gap structure under broken mirror symmetry is under debate. In our cleanest few-layer device, we observe a superconducting critical temperature comparable to that of the bulk. The temperature evolution of the phase stiffness features nodeless behavior in the presence of broken mirror symmetry, inconsistent with the scenario of nodal surface superconductivity. With minimal fabrication requirements, our technique enables microwave measurements across wide ranges of two-dimensional superconductors. |
| title | Contactless cavity sensing of superfluid stiffness in atomically thin 4Hb-TaS$_2$ |
| topic | Superconductivity Mesoscale and Nanoscale Physics Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2510.25124 |